A strong high-performance exhaust system pairs a vehicle-specific fit with the sound, tubing, and construction that suit your driving; these options cover truck, SUV, and sports-car applications. Flowmaster 817854 Outlaw Cat-Back leads with a listed maximum dyno gain of 10 hp and 13 lb.ft. of torque, full stainless-steel construction, and a deep tone.
Other choices emphasize different priorities: Flowmaster 717787 FlowFX offers dual 2.5-inch tubing and included installation hardware, while MagnaFlow 19538 highlights high clearance and drone-free tuning for off-road travel. Fitment is the first filter, not an afterthought.
Several listings name exact vehicle and engine combinations, while others provide limited compatibility information. Check the product listing against your vehicle before choosing, then compare sound, materials, and system layout.
Flowmaster 817854 Outlaw Cat-Back is the leading choice in this set for a buyer whose vehicle matches its application. It lists maximum dyno gains of 10 hp and 13 lb.ft. of torque, mandrel-bent 3.00-inch dual tailpipes, full stainless-steel construction, and a deep tone inside and outside the vehicle.
It uses factory hanger locations and includes a lifetime limited warranty. Confirm your exact vehicle and engine fitment before purchase; those performance and construction details do not establish universal compatibility.
Our Top Picks
Best OverallLists maximum dyno gains of 10 hp and 13 lb.ft. of torque, full stainless-steel construction, and 3.00-inch mandrel-bent dual tailpipes.
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Best Included HardwareSpecifies a Silverado and Sierra application, dual 2.5-inch stainless tubing, a straight-through muffler, and included clamps, hangers, and hardware.
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Best Off-Road DesignThe Overland Series system lists a high-clearance design, stainless-steel construction, drone-free tuning, and a bolt-on installation type.
View on Amazon- Best Large-Diameter Tubing aFe MACH Force-Xp
Compare Fitment, Construction, and Sound
| # | Product | Weight | Material Type | Material | Buy |
|---|---|---|---|---|---|
| 1 | 1. Flowmaster 817854 OutlawBest Overall | 64 lb | Plastic | Plastic | View on Amazon |
| 2 | 2. Flowmaster 717787 FlowFXBest Included Hardware | 41.6 lb | Plastic | Plastic | View on Amazon |
| 3 | 3. MagnaFlow 19538Best Off-Road Design | 28 lb | Stainless Steel | Stainless Steel | View on Amazon |
| 4 | 4. Flowmaster 717857 FlowFXClassic-body Silverado owners | 47.4 lb | Plastic | Plastic | View on Amazon |
| 5 | 5. aFe MACH Force-XpBest Large-Diameter Tubing | 60 lb | Stainless Steel | Stainless Steel | View on Amazon |
| 6 | 6. MBRP S7275BLK Race VersionBlack-finish dual-exhaust fans | 55 lb | — | — | View on Amazon |
| 7 | 7. Borla 14780F-body V8 owners | 5 lb | — | — | View on Amazon |
| 8 | 8. Flowmaster Super 44 Truck KitMulti-brand truck dual-exhaust buyers | — | Aluminum | Aluminum | View on Amazon |
| 9 | 9. Borla 140836 S-TypeGrand Cherokee V6 owners | 52.6 lb | — | — | View on Amazon |
| 10 | 10. MBRP S5093AL CompetitionCompetition exhaust shoppers | 69 lb | — | — | View on Amazon |
Detailed Reviews: Best High Performance Exhaust System

#1 · Best Overall
1. Flowmaster 817854 Outlaw
- Weight: 64 lb
- Material Type: Plastic
- Material: Plastic
Best for: Sound-focused Silverado owners.
Why it ranks #1: Lists maximum dyno gains of 10 hp and 13 lb.ft. of torque, full stainless-steel construction, and 3.00-inch mandrel-bent dual tailpipes.
Four-inch black ceramic-coated stainless tips and a deep, powerful tone inside and outside the cabin define Flowmaster’s Outlaw cat-back. It pairs that bold sound with stated maximum dyno gains of 10 hp and 13 lb.-ft. of torque, giving Silverado and Sierra 1500 owners a system aimed at both presence and performance.
Mandrel-bent 3-inch dual tailpipes support the system’s performance focus, while the full stainless-steel construction supplies a durable material choice. Using factory hanger locations can simplify positioning during installation, and Flowmaster describes installation as easy at home. The listed application is GM trucks with a 5.3L V8, including 2019 Silverado/Sierra 1500 models, so buyers should keep that engine and vehicle scope in view. Its prominent cabin-and-exterior tone suits drivers who want an audible change, not a subdued exhaust.
- Large 4-inch black ceramic-coated stainless tips
- Deep, powerful tone inside and outside the vehicle
- Maximum dyno gains stated as 10 hp and 13 lb.-ft. of torque
- Mandrel-bent 3-inch dual tailpipes use factory hanger locations
- Its deep, powerful tone is prominent inside the vehicle.
Skip it if you want a quiet cabin; the Outlaw is specified for a deep, powerful tone inside and outside, while the Flowmaster FlowFX 717857 has a straight-through muffler.
Choose this Outlaw for a 5.3L GM truck owner seeking an assertive cabin-and-exterior sound, dual tailpipes, and stated dyno gains. Its listed application is specific, and its tone is not understated.
Full product details
| Brand | Flowmaster |
|---|---|
| Compatible with Vehicle Type | Car, Truck |
| Included Components | Flowmaster 817854 Flowmaster 817854 Cat-Back Exhaust System Outlaw fits 2019 Silverado/Sierra 1500 Exhaust System Kit Cat-Back Exhaust System Outlaw fits 2019 Silverado/Sierra 1500 |
| Inlet Connection Size | 3 inches |
| Item Dimensions | 63.5 x 16 x 15.25 inches |
| Item Weight | 64 pounds |
| Dimensions | 63.5 x 16 x 15.25 inches |
| Manufacturer | Flowmaster |
| Part Number | 817854 |
| Manufacturer Warranty Description | 7 Year Limited |
| Material | Plastic |
| Model Number | 817854 |
Listed on Amazon as: Flowmaster 817854 Outlaw Cat-back Exhaust System
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#2 · Best Included Hardware
2. Flowmaster 717787 FlowFX
- Weight: 41.6 lb
- Material Type: Plastic
- Material: Plastic
Best for: Crew and double cab GM owners.
Why it ranks #2: Specifies a Silverado and Sierra application, dual 2.5-inch stainless tubing, a straight-through muffler, and included clamps, hangers, and hardware.
Dual 2.5-inch tailpipes and a Flow FX straight-through muffler give this cat-back its performance layout, while a moderate-to-aggressive sound profile sets expectations for the cabin. Four-inch black ceramic-coated tips complete the setup for specified classic-body Silverado and Sierra 1500 cab configurations.
Stainless-steel mandrel-bent tubing and a dyno-tuned design are presented as performance features, while the straight-through muffler supports the kit’s moderate-to-aggressive sound. Included clamps, hangers, and necessary hardware help make the installation package more complete, and Flowmaster describes installation as easy. The listing identifies 2014–2018 GM 1500 Crew Cab and Double Cab models with a 5.3L V8, but notes an exclusion for Crew Cab 2WD vehicles with a two-piece driveshaft. Check that exception closely.
- Flow FX straight-through performance muffler
- Dual 2.5-inch tailpipes with mandrel-bent stainless tubing
- Moderate-to-aggressive sound profile
- Clamps, hangers, and necessary hardware included
- It does not fit Crew Cab 2WD models with a two-piece driveshaft.
Skip it if you have a Crew Cab 2WD with a two-piece driveshaft; this kit excludes it, while Flowmaster FlowFX 717857 lists classic-body Silverado/Sierra 1500 applications.
Choose this FlowFX for a listed 5.3L GM 1500 Crew Cab or Double Cab owner seeking dual outlets and moderate-to-aggressive sound. The Crew Cab 2WD two-piece-driveshaft exclusion is a firm fit boundary.
Full product details
| Brand | Flowmaster |
|---|---|
| Color | Multicolor |
| Compatible with Vehicle Type | Car |
| Included Components | Flowmaster 717787 Cat-Back 409S – FlowFX Kit – DOSS – Moderate/Aggressive Sound – 14-18 GM 1500 Series Exhaust System Kit Cat-Back 409S – FlowFX Kit – DOSS – Moderate/Aggressive Sound |
| Item Weight | 41.6 pounds |
| Manufacturer | Flowmaster |
| Part Number | 717787 |
| Manufacturer Warranty Description | Limited Lifetime |
| Material | Plastic |
| Model Number | 717787 |

#3 · Best Off-Road Design
3. MagnaFlow 19538
- Weight: 28 lb
- Material Type: Stainless Steel
- Material: Stainless Steel
Best for: Overland and trail drivers.
Why it ranks #3: The Overland Series system lists a high-clearance design, stainless-steel construction, drone-free tuning, and a bolt-on installation type.
A high-clearance design aimed at improving ground clearance and departure angle makes MagnaFlow’s Overland Series cat-back a trail-oriented choice. No Drone Technology and versatile tuning are also specified, connecting its off-road focus with a more comfortable cabin experience on extended drives across varied terrain.
The high-clearance layout is intended to improve ground clearance and departure angle, which matters when choosing an exhaust for obstacles and trail approach geometry. MagnaFlow’s No Drone Technology and versatile tuning target comfort on long drives while retaining the system’s signature sound. Stainless-steel construction supports durability, and the kit includes hardware with a bolt-on installation type, helping buyers plan the installation workflow. The listing describes dyno-proven performance and a drone-free driving experience, but does not supply a vehicle application in the provided details.
- High-clearance design intended to improve ground clearance and departure angle
- No Drone Technology
- Versatile tuning for long-drive comfort
- Stainless-steel construction and included hardware kit
- Its high-clearance, trail-focused benefits matter less for pavement-only driving.
Skip it if you mainly want a street-focused truck exhaust; this system emphasizes trail clearance, while the Flowmaster FlowFX 717857 lists a Silverado/Sierra 1500 application.
This is a fit for overland drivers who value clearance, trail departure geometry, and reduced drone on long journeys. Keep the application boundary in mind: the supplied details do not identify a specific vehicle fitment.
Full product details
| Brand | MagnaFlow Exhaust Products |
|---|---|
| Color | Stainless Steel |
| Included Components | Hardware Kit |
| Installation Type | Bolt-On |
| Item Weight | 28 pounds |
| Manufacturer | magnaflow Exhaust Products |
| Part Number | 19538 |
| Manufacturer Warranty Description | Limited Lifetime Construction Warranty |
| Material | Stainless Steel |
| Model Number | 19538 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: MagnaFlow Performance Cat-Back Exhaust System Kit 19538
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#4
4. Flowmaster 717857 FlowFX
- Weight: 47.4 lb
- Material Type: Plastic
- Material: Plastic
Best for: Classic-body Silverado owners.
Why it ranks #4: Names a 2014–2019 classic-body Silverado and Sierra 1500 application, with a straight-through muffler and stainless construction.
A Flow FX straight-through performance muffler gives this cat-back its central performance feature, paired with a deep, powerful tone inside and outside the vehicle. Its 4.5-inch black ceramic-coated stainless tip adds a dark finishing detail for specified 2014–2019 classic-body Silverado and Sierra 1500 applications.
The 3-inch 409 stainless-steel system combines a straight-through Flow FX muffler with a single large black ceramic-coated tip, linking its exhaust design to both sound and appearance. Factory hanger locations can help make alignment more straightforward, and the listed bolt-on installation type supports a conventional mounting workflow. The stated vehicle scope covers classic-body Chevy Silverado and GMC Sierra 1500 with 4.3L or 5.3L engines. Check that body and engine application against the vehicle before choosing.
- Flow FX straight-through performance muffler
- Deep, powerful tone inside and outside the vehicle
- 4.5-inch black ceramic-coated stainless tip
- Factory hanger locations and bolt-on installation
- The listed application is limited to classic-body Silverado/Sierra 1500 trucks with 4.3L or 5.3L engines.
Skip it if you need a dual-tailpipe setup; this kit lists one 4.5-inch tip, while the Flowmaster FlowFX 717787 specifies dual 2.5-inch tailpipes.
This fits owners of the listed classic-body Silverado or Sierra 1500 seeking Flow FX sound, a bolt-on layout, and a black-coated tip. Its 4.3L or 5.3L engine application is an important fit boundary.
Full product details
| Brand | Flowmaster |
|---|---|
| Color | Multicolor |
| Compatible with Vehicle Type | Truck |
| Included Components | Flowmaster 717857 Flowmaster FlowFX Cat-Back Exhaust System. Exhaust System Kit 14-18 SILVERADO/SIERRA 1500 5.3L CB S |
| Installation Type | Bolt-On |
| Item Weight | 47.4 pounds |
| Manufacturer | Flowmaster |
| Part Number | 717857 |
| Manufacturer Warranty Description | Warranty |
| Material | Plastic |
| Model Number | 717857 |

#5 · Best Large-Diameter Tubing
5. aFe MACH Force-Xp
- Weight: 60 lb
- Material Type: Stainless Steel
- Material: Stainless Steel
Best for: Large-tubing off-road users.
Why it ranks #5: Uses 4-inch mandrel-bent 409 stainless tubing and lists a high-flow muffler, bayonet-style hangers, and a polished stainless tip.
Four-inch mandrel-bent 409 stainless-steel tubing is the defining feature of aFe Power’s MACH Force-Xp cat-back, intended to support increased exhaust flow. A high-flow muffler, bayonet-style hangers, and included polished stainless tip round out a setup aimed at buyers who prioritize flow and straightforward hanger placement.
The 4-inch mandrel-bent tubing is described as supporting increased flow, horsepower, torque, and lower exhaust gas temperatures, giving performance-focused buyers a clear reason to consider the larger-diameter layout. A high-flow muffler complements that flow-oriented design, while bayonet-style hangers are specified for a solid fit and easy installation. The polished stainless tip is included, so the finish is part of the package. The supplied legal disclaimer says products are for racing and off-road use unless clearly stated otherwise.
- 4-inch mandrel-bent 409 stainless-steel tubing
- High-flow muffler
- Bayonet-style hangers for a solid fit and easy installation
- Polished stainless tip included
- The supplied legal disclaimer limits use to racing and off-road unless otherwise stated.
Skip it if you need an exhaust explicitly presented for public-road use; the supplied disclaimer says racing and off-road use, while MagnaFlow 19538 is presented for overland driving.
Choose the MACH Force-Xp for a buyer prioritizing large stainless tubing, flow, and bayonet-style hanger installation for racing or off-road use. The supplied disclaimer makes public-road suitability a boundary to consider.
Full product details
| Brand | aFe Power |
|---|---|
| Included Components | Per Item Description |
| Inlet Connection Size | 4 inches |
| Item Weight | 60 pounds |
| Manufacturer | AFE Filters |
| Part Number | 49-44010 |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Stainless Steel |
| Model Number | 49-44010 |
| Additional Information | Important information |
Listed on Amazon as: aFe Power #49-44010 MACH Force-Xp Cat-Back Exhaust System
View on AmazonWhy it ranks #6: Offers a dual-split-rear cat-back layout, 4.5-inch black-coated tips, and a black high-heat finish with a one-year warranty.
A black high-heat powercoated finish gives MBRP’s Race Version cat-back a dark visual signature alongside its classic MBRP sound. The 3-inch dual-split rear layout and 4.5-inch black-coated tips make the exhaust’s outlet arrangement and finish central considerations for buyers selecting a performance system.
The 3-inch cat-back tubing and dual-split rear arrangement specify the system’s basic exhaust path, while the 4.5-inch tips carry the black finish through to the visible outlets. MBRP says the system boosts horsepower and torque, connecting the performance intent to its Race Version designation. Its high-heat black coating is formulated for extreme heat and abrasion, and the additional description cites fully sealed seams to resist rust. The listed black-coating warranty is one year.
- 3-inch cat-back system with dual-split rear exit
- 4.5-inch black-coated tips
- High-heat black finish formulated to withstand heat and abrasion
- Fully sealed seams described as resisting rust
- The black-coating warranty is one year.
Skip it if you want a longer stated finish warranty; this coating is warranted for one year, while the Flowmaster Outlaw 817854 lists a lifetime limited warranty.
Pick this MBRP for a buyer prioritizing a black-finished dual-split rear exhaust and classic MBRP sound. The high-heat coating and sealed seams suit that finish-focused choice, with the one-year coating warranty as a boundary.
Full product details
| Brand | MBRP |
|---|---|
| Item Weight | 55 pounds |
| Item model number | S7275BLK |
| Manufacturer | MBRP Exhaust |
| Part Number | S7275BLK |
| Model | JEGS |
Listed on Amazon as: MBRP S7275BLK 3" Cat Back, Dual Split Rear, Race Version Exhaust System with 4.5" Tips (Black Coated)
View on AmazonWhy it ranks #7: Specifies fitment for 1998–2002 Camaro and Firebird 5.7L V8 models and describes T-304 stainless-steel construction.
T-304 stainless steel is the key material in Borla’s 14780 cat-back, which is listed for 1998–2002 Camaro SS, Camaro Z28, and Pontiac Firebird/Trans-Am models with a 5.7L V8. Borla also cites its distinctive Sound of Power and performance gains in power and torque.
The stated T-304 stainless construction is described as able to withstand extreme conditions, supporting buyers seeking a durable material for their performance exhaust. Borla also says its systems provide more power and torque and a precision fit, linking the cat-back to performance and installation considerations. Its application is unusually specific: the listed F-body models, 5.7L V8, and automatic or manual transmission in coupe or convertible form. Buyers should use that exact scope when assessing compatibility.
- T-304 stainless-steel construction
- Borla describes a distinctive Sound of Power
- Borla states the system adds power and torque
- Listed for automatic or manual coupe and convertible applications
- Application is limited to the listed 1998–2002 F-body models with a 5.7L V8.
Skip it if you drive a truck or a different engine application; this Borla is listed for 5.7L F-body models, while the Flowmaster Outlaw 817854 is listed for GM trucks.
This Borla suits owners of the specified 1998–2002 Camaro or Firebird/Trans-Am seeking stainless construction and Borla sound. Its 5.7L V8 and transmission/body-style scope is the key fit boundary.
Full product details
| Brand | Borla |
|---|---|
| Item Weight | 5 pounds |
| Item model number | 14780 |
| Manufacturer | Borla |
| Part Number | 14780 |
| Model | Borla 14780 |
Listed on Amazon as: BORLA 14780 Cat-Back Performance Exhaust System for 1998-2002 Chevrolet Camaro SS/Camaro Z28/ Pontiac Firebird/Trans-Am 5.7L V8 Automatic/Manual Transmission Coupe/Convertible.
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#8
8. Flowmaster Super 44 Truck Kit
- Material Type: Aluminum
- Material: Aluminum
Best for: Multi-brand truck dual-exhaust buyers.
Why it ranks #8: Lists truck applications across Ram, Ford, Silverado, and Sierra, plus a Super 44 muffler and dual 2.5-inch tailpipes.
A Flowmaster Super 44 muffler anchors this dual-exhaust kit, pairing a 3-inch inlet with dual 2.5-inch outlets for truck owners seeking a deep, aggressive rumble. Its listed applications span Ram, Ford F-Series, Silverado, and Sierra trucks, while chrome angle-cut tips finish the tailpipe setup.
The single 3-inch inlet and dual 2.5-inch high-flow, mandrel-bent tailpipes create a defined route from muffler to outlets, making the dual configuration clear for installation planning. The two 3.5-by-18-inch angle-cut chrome tips are weld-on, so fitting them involves welding rather than simply relying on a clamp-on tip arrangement. The kit uses aluminized construction, a material distinction worth weighing against stainless options. Its truck application range is broad, but vehicle-specific fit still matters.
- Flowmaster Super 44 muffler
- Single 3-inch inlet and dual 2.5-inch outlets
- Two high-flow, mandrel-bent tailpipes
- Two 3.5-by-18-inch weld-on chrome tips
- The included chrome tips are weld-on, requiring a welding step for installation.
Skip it if you prefer a stainless-steel kit; this one uses aluminized construction, while the Flowmaster Outlaw 817854 lists full stainless-steel construction.
This suits truck owners seeking a Flowmaster Super 44 sound and a dual-tailpipe layout across the listed Ram, Ford F-Series, Silverado, and Sierra families. Account for the weld-on tips and aluminized construction.
Full product details
| Brand | Magnum Exhaust |
|---|---|
| Compatible with Vehicle Type | Truck |
| Inlet Connection Size | 3 inches |
| Item Dimensions | 48 x 21 x 9 inches |
| Dimensions | 48 x 21 x 9 inches |
| Manufacturer | Magnum Exhaust |
| Part Number | DK107-CH |
| Material | Aluminum |
| Outlet Connection Size | 2.5 inches |
Listed on Amazon as: Flowmaster Super 44 Mandrel-Bent Aluminized Dual Truck Exhaust Kit w/Chrome Tips for Silverado, Sierra, F-Series & Ram
View on AmazonWhy it ranks #9: Names a Grand Cherokee High Altitude or Summit 3.6L V6 application and specifies a 2.25-inch S-Type cat-back.
Borla’s S-Type cat-back is specified for 2014–2020 Grand Cherokee High Altitude and Summit models with a 3.6L V6 and two- or four-wheel drive. Its 2.25-inch tubing specification gives those buyers a concrete sizing detail when evaluating this application-specific exhaust.
The 2.25-inch specification identifies the tubing size for this S-Type cat-back, helping buyers distinguish it from systems with larger stated tubing. Its listed fit covers Grand Cherokee High Altitude and Summit trims, 3.6L V6 engines, and both 2WD and 4WD configurations across the stated model years. That precise application can simplify narrowing the choice when the vehicle matches, but it also makes the fit scope central. The supplied description does not state additional sound, material, or installation features.
- S-Type cat-back configuration
- 2.25-inch tubing specification
- Listed for High Altitude and Summit trims
- Application includes 3.6L V6 with 2WD or 4WD
- The stated fitment is limited to 2014–2020 Grand Cherokee High Altitude/Summit 3.6L V6 models.
Skip it if you drive a different Grand Cherokee trim or engine; this is listed for High Altitude/Summit 3.6L V6 models, while Borla 14780 serves specified Camaro and Firebird V8s.
This Borla is for Grand Cherokee High Altitude or Summit owners with the listed 3.6L V6, whether 2WD or 4WD. Its narrow trim and engine application is the essential fit boundary.
Full product details
| Brand | Borla |
|---|---|
| Item Weight | 52.6 pounds |
| Manufacturer | Borla |
| Part Number | 140836 |
| Model Number | 140836 |
Listed on Amazon as: Borla 14-20 Grand Cherokee High Altitude/Summit 3.6L V6 2/4WD 2.25in S-Type Cat-back – 140836
View on AmazonWhy it ranks #10: Lists a 4-inch single-side-exit aluminized cat-back, but provides no specific vehicle fitment or detailed installation components.
A 4-inch tube and single-side exit define MBRP’s Competition Series cat-back, a configuration for buyers looking for a large-diameter performance exhaust with a simple outlet description. MBRP also describes its systems as high-flow, connecting the tubing choice to exhaust-flow and temperature goals.
The 4-inch tubing gives this system a clear large-diameter specification, while the single-side exit helps buyers picture the outlet arrangement when planning the vehicle’s rear layout. MBRP says its high-flow exhaust systems maximize flow and lower exhaust temperatures, with claimed benefits including torque, horsepower, and fuel efficiency. This version is identified as a Competition Series cat-back and uses aluminized construction. Its listed details do not establish a particular vehicle application, so fitment remains a necessary selection consideration.
- 4-inch tubing
- Single-side exit configuration
- Competition Series cat-back designation
- MBRP describes high flow and lower exhaust temperatures
- The system uses aluminized construction.
Skip it if you want stainless-steel construction; this MBRP uses aluminized material, while the Borla 14780 specifies T-304 stainless steel.
Consider this MBRP if a Competition Series label, 4-inch tubing, and single-side exit match your exhaust priorities. Its aluminized construction and application-specific fit should guide the final selection.
Full product details
| Brand | MBRP |
|---|---|
| Item Weight | 69 pounds |
| Item model number | S5093AL |
| Manufacturer | MBRP |
| Part Number | S5093AL |
| Model | S5093AL |
| Dimensions | 46.5 x 16.5 x 12 inches |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer – www.P65Warnings.ca.gov |
Listed on Amazon as: MBRP Exhaust S5093AL Cat Back Performance Exhaust System 4 in. Tubing Single Side Exit Aluminized Cat Back Performance Exhaust System
View on AmazonFitment traps that can rule out a cat-back
A cat-back can be unsuitable even when its broad vehicle name seems right, because cab, drivetrain, engine, and body style can change fitment. Flowmaster 717787, for example, names 2014–2018 Silverado and Sierra 1500 Crew Cab and Double Cab models with a 5.3L V8, and its listing warns that it does not fit crew-cab 2WD vehicles with a two-piece driveshaft. Flowmaster 717857 instead describes a classic-body Silverado and Sierra 1500 application, while Borla 14780 specifies Camaro and Firebird 5.7L V8 models.
These are not interchangeable just because each is a cat-back. Before ordering, compare the exact year range, engine, cab or body, and drivetrain in the fitment details with your vehicle.
If a listing gives no application details, as with MBRP S5093AL, do not assume it fits based on tubing diameter or exit style alone.
Sound, clearance, and cabin comfort trade-offs
A louder or more aggressive exhaust is not automatically the best match for long drives or trail use. Flowmaster 817854 Outlaw is explicitly aimed at maximum sound levels inside and outside the vehicle, whereas Flowmaster 717787 describes a moderate/aggressive sound. MagnaFlow 19538 takes a different approach: its Overland Series description highlights No Drone Technology and a high-clearance design for ground clearance and departure angle.
Those priorities may matter more than sound intensity for someone driving long distances or navigating obstacles. The product data does not provide comparable decibel measurements or independent sound tests, so descriptions such as deep, aggressive, and drone-free should not be treated as directly measured against one another.
Decide whether your priority is a pronounced exhaust note, a more restrained drive, or clearance, and use the stated vehicle fitment as a separate check.
How to Choose a High-Performance Exhaust
Vehicle fitment and system layout
Start with the exact vehicle application, then check whether the layout suits your setup. The listed products range from Flowmaster 717787’s dual 2.5-inch tailpipes for specified Silverado and Sierra models to MBRP S5093AL’s 4-inch single-side-exit system, which gives no vehicle application in the supplied details. Flowmaster 817854 lists 3.00-inch dual tailpipes and factory-hanger mounting, while Borla 14780 names Camaro and Firebird 5.7L V8 fitment.
Buyers with a closely matching, explicitly named vehicle should favor those specific applications. If the listing provides little fitment detail, treat that as a reason to verify compatibility rather than infer it from pipe size, brand, or exhaust style.
Tubing diameter and construction
Compare stated tubing size and material only after confirming fitment. The set includes 2.25-inch tubing on Borla 140836, dual 2.5-inch pipes on Flowmaster 717787, 3.00-inch dual tailpipes on Flowmaster 817854, and 4-inch tubing on aFe MACH Force-Xp and MBRP S5093AL. Material descriptions include 409 stainless steel for aFe MACH Force-Xp, stainless steel for MagnaFlow 19538, and aluminized construction for MBRP S5093AL.
Larger diameter alone does not prove better results for a particular engine, and the systems serve different vehicles. A buyer prioritizing listed stainless construction can compare the stainless options; someone considering a 4-inch system should first verify that its application and layout match the vehicle.
Sound and driving priorities
Choose an exhaust sound profile that fits where and how you drive, because the descriptions span noticeably different aims. Flowmaster 817854 Outlaw is described as producing maximum sound levels and a deep tone inside and outside the vehicle. Flowmaster 717787 lists moderate/aggressive sound, while MagnaFlow 19538 emphasizes No Drone Technology and comfort on long drives.
The product details do not provide standardized sound levels, so these descriptions cannot establish which system is objectively loudest. Buyers seeking a pronounced tone may prefer the Outlaw’s stated character; those concerned about cabin comfort can give more weight to MagnaFlow’s drone-free tuning claim.
Always consider local sound and emissions requirements separately, since the provided listings do not settle every jurisdiction’s rules.
Which Exhaust System Fits Your Driving?
For a matching vehicle and a priority on stated gains, dual tailpipes, and a deep, attention-getting sound, choose Flowmaster 817854 Outlaw. Silverado or Sierra owners should compare the exact application details: Flowmaster 717787 FlowFX lists Crew Cab and Double Cab fitment with included hardware, while Flowmaster 717857 FlowFX names classic-body models. For off-road use where clearance and cabin comfort matter, MagnaFlow 19538 is the most purpose-focused option, with high-clearance design and No Drone Technology.
If your vehicle is a specified Camaro or Firebird 5.7L V8, Borla 14780 has the most relevant listed fitment. aFe MACH Force-Xp suits buyers considering 4-inch stainless tubing, but verify application before purchase.
Avoid choosing on pipe diameter or sound description alone; confirm the full vehicle configuration against the listing.
Related Buying Guides
Frequently Asked Questions
How can I confirm that a cat-back exhaust fits my vehicle, engine, cab, and drivetrain?
Match the listing to your vehicle’s exact year, make, model, engine, cab, and drivetrain before ordering. Read the full application details rather than relying on a broad vehicle name or pipe size. When any configuration is unclear, confirm it with the seller or manufacturer; listed fitment for one version does not establish universal compatibility.
Will a louder exhaust system create cabin drone during highway driving?
It can, but a sound description alone cannot predict how an exhaust will behave in your vehicle at highway speeds. Check the product listing for cabin-comfort details and seek information specific to your vehicle and configuration. MagnaFlow 19538 is described as having No Drone Technology, but that detail does not apply to the other systems here.
Do exhaust-system sound and emissions rules vary where I drive?
Yes. Applicable sound and emissions requirements can differ by location and vehicle use. Check the rules that apply where you register and drive before choosing or installing an exhaust system, and confirm that the specific product and your vehicle configuration meet them.
Do not assume that a product’s fitment listing establishes local compliance.
What should I verify about installation before choosing a system?
Check the listing for included hardware, mounting details, and any vehicle-specific installation requirements before purchase. For example, the Flowmaster 717787 listing specifies included hardware, while the editorial details say the 817854 uses factory hanger locations. Those details are product-specific; verify them for the exact system and vehicle you plan to use.
How should I compare advertised performance gains between exhaust systems?
Treat stated gains as product-specific claims, not guaranteed results for every vehicle. The Flowmaster 817854 lists maximum dyno gains of 10 hp and 13 lb.ft. of torque, but those figures do not establish compatibility or results for other systems.
Confirm fitment first, then weigh stated gains alongside sound, construction, and your priorities.
Final Words
Start with exact vehicle fitment, including engine, cab, and drivetrain, then narrow the choice by sound, construction, and intended use. For a matching application where listed gains and a deep, attention-getting tone matter, the Flowmaster 817854 is the leading choice here. Consider MagnaFlow 19538 for off-road clearance and cabin comfort, and compare the exact Silverado or Sierra application before selecting either FlowFX kit.
Verify local rules before buying.






