Best Ls Intake For Boost: LS3 Lo-Ram and High-Ram Options

#1 · Best Overall

1. Holley LS3 Lo-Ram

• Weight: 33.8 lb

Best for: Low-profile forced-induction packaging.

Why it ranks #1: Explicitly designed for supercharged or turbocharged use with LS3/L92 heads; its low-height layout supports specified intercooler and hood packaging.

Low height is the Holley LS3 Lo-Ram’s defining packaging advantage for forced-induction LS builds, with the listing tying its profile to top-feed air-to-water intercooler placement or front-feed use under a stock or mildly modified hood. It is specified for GM LS Gen III and IV engines with LS3/L92 heads.

Holley specifies this manifold for supercharged or turbocharged applications with peak power at 7,000–8,000 rpm, so its intended operating focus is explicit. Its low height supports packaging a plenum-mounted air-to-water intercooler in a top-feed configuration, or fitting under a stock or mildly modified hood in a front-feed arrangement. The modular design uses the included plenum entry, and mounting hardware is included. Those features make the layout more adaptable to the two stated forced-induction packaging approaches.

Skip it if you have cathedral-port LS1, LS2, or LS6 heads; FAST LSXr 102mm Intake Manifold for LS1, LS2, and LS6 is listed for those engines.

This is a focused option for LS Gen III/IV builds with LS3/L92 heads that need forced-induction packaging flexibility. Choose between its stated top-feed and front-feed layouts according to intercooler placement and hood clearance.

Listed on Amazon as: Holley 300-679: Ls3 Lo-Ram Manifold Kit, Single Injector

#2 · Largest Listed Plenum

2. DEEPMOTOR 102mm High-Ram

• Weight: 22.7 lb
• Package Dimensions: 24.6 x 15.7 x 12.6 in

Best for: High-RPM sheet-metal LS builds.

Why it ranks #2: Its 9.65L plenum and 102mm throttle-body opening suit high-airflow LS1, LS2, and LS6 setups, although boost fitment is not stated.

A 9.65-liter plenum is the defining feature of DEEPMOTOR’s 102mm high-ram manifold, giving high-horsepower LS builds a large-volume intake layout aimed at high-RPM airflow. Its sheet-metal race style and stated LS1, LS2, and LS6 application make it a focused choice for builds prioritizing top-end performance.

The 9.65L plenum is specified to maximize airflow and support high-horsepower applications at high RPM, giving this manifold a distinct role from a street-focused intake. Its 102mm throttle-body opening supports large throttle-body setups, with the supplied description also connecting that opening to improved airflow efficiency, throttle response, and top-end performance. TIG-welded 3mm T6061 aluminum provides the stated fabrication strength. The listing does not supply detailed vehicle-fitment or installation dimensions beyond package dimensions.

Skip it if you need a low-profile forced-induction package for LS3/L92 heads; Holley 300-679 specifically addresses low-height packaging.

Consider it for an LS1, LS2, or LS6 performance build centered on a large plenum and high-RPM airflow. Its 102mm opening and high-ram race format make it a poor match when compact packaging is the priority.

Listed on Amazon as: LS1 LS2 LS6 102mm High-Ram EFI Intake Manifold – Sheet Metal Style Race Intake w/Fuel Rails & Large Plenum

#3 · High-RPM Cathedral Port

3. JGhyperX LS Hi-Ram

• Weight: 31.9 lb

Best for: Cathedral-port high-RPM EFI builds.

Why it ranks #3: The LS1/LS2/LS6 cathedral-port Hi-Ram lists a 92mm bore and a 3,500–8,000 rpm operating range, with fuel rails included.

A stated 3,500–8,000 rpm operating range gives the JGhyperX 300-122 a clear high-rpm Hi-Ram role for LS1, LS2, and LS6 builds. It uses a 92mm throttle-body bore and is explicitly limited to cathedral-port heads, helping define both its intended operating range and head compatibility.

The 3,500–8,000 rpm range makes this EFI manifold relevant to builds focused on that operating band, rather than buyers seeking a stated low-rpm emphasis. Its 92mm throttle-body bore sets the listed throttle-body size, and the cathedral-port-only note narrows head compatibility. Fuel rails are machined for -8 AN O-ring male fittings, an important connection detail for fuel-system planning. The package description lists a fuel rail kit and some pictured parts, though the supplied facts do not itemize every included component.

Skip it if you have LS3/L92 rectangle-port heads; JGhyperX 300-116 LS Hi-Ram EFI Intake Manifold for LS3 L92 is listed for those engines.

This fits a cathedral-port LS1, LS2, or LS6 EFI build targeting the stated 3,500–8,000 rpm band. Confirm that the 92mm throttle-body bore and -8 AN rail connections work with the planned intake and fuel-system components.

Listed on Amazon as: 300-122 LS Hi-Ram EFI Intake Manifold for LS1 LS2 LS6 Black

#4

4. JGhyperX LS3 Hi-Ram

• Weight: 30.2 lb

Best for: LS3/L92 high-rpm EFI builds.

Why it ranks #4: A 92mm LS3/L92 Hi-Ram lists a 3,500–8,000 rpm range and complete intake section; its listing does not specifically identify boosted use.

A longitudinal plenum top paired with a 92mm bore defines the JGhyperX 300-116 Hi-Ram for LS3 and L92 builds. Its specified 3,500–8,000 rpm operating range gives buyers a clear high-rpm EFI focus, while the stated front and rear height of 12.32 inches provides a concrete packaging measurement.

The 3,500–8,000 rpm operating range identifies the intended engine-speed band, and the 92mm throttle-body bore sets the listed throttle-body size. Its longitudinal plenum top and multi-port fuel-injection style establish the supplied intake and fuel-system layout. Fuel rails are machined for -8 AN O-ring fittings, which is useful when planning fuel-line connections. The 12.32-inch front/rear height is a key clearance dimension to account for before choosing this Hi-Ram configuration.

Skip it if you need a stated cathedral-port LS1/LS2/LS6 manifold; JGhyperX 300-122 LS Hi-Ram EFI Intake Manifold is listed for those heads.

Choose this for an LS3 or L92 EFI build that matches its 92mm bore, -8 AN rail fittings, and high-rpm range. Its 12.32-inch stated height makes under-hood clearance a key fit consideration.

Listed on Amazon as: 300-116 LS Hi-Ram EFI Intake Manifold for LS3 L92 Black

#5 · Modular Runner Design

5. FAST LSXr 102mm

• Weight: 19.45 lb

Best for: Cathedral-port street and boost builds.

Why it ranks #5: For cathedral-port LS1, LS2, and LS6 engines, it offers a 102mm inlet and removable runners; the description emphasizes airflow, not boost.

A 102mm inlet paired with longer, less-restrictive runners gives the FAST LSXr a clear airflow focus while retaining low-RPM torque. Its LS1, LS2, and LS6 cathedral-port application suits builds seeking a larger intake path without giving up the drivability the supplied facts specifically call out.

The 102mm inlet is suited to FAST’s Big Mouth 102mm throttle body, while the stated compatibility with OEM or aftermarket 90mm and 92mm throttle bodies gives builders other listed throttle-body sizes to use. Longer runners and a larger inlet than stock are specified to add horsepower while maintaining low-RPM torque, a useful combination for a street-oriented setup. The modular, removable runners allow disassembly and porting, and the polymer construction is lighter and runs cooler than aluminum.

Skip it if you need an LS3/L92 rectangle-port manifold; Holley 300-679 is listed for those heads and forced-induction applications.

Choose this for a cathedral-port LS1, LS2, or LS6 build that values a large inlet, runner serviceability, and stated low-speed torque retention. Check that its 102mm-focused layout suits your throttle body and engine configuration.

Listed on Amazon as: FAST LSXr 102mm Intake Manifold for LS1, LS2, and LS6 (146302B), black

#6

6. FAST LSXr Throttle Body Kit

• Weight: 18.4 lb
• Package Dimensions: 30 x 23 x 21.5 in

Best for: Matched 102mm manifold and throttle body.

Why it ranks #6: Combines the cathedral-port LSXr manifold with a 102mm Big Mouth throttle body, but the product description does not specify forced-induction use.

Pairing a FAST LSXr manifold with a 102mm Big Mouth billet throttle body makes this kit’s clearest advantage a matched large-bore intake combination. The listing connects its improved manifold flow and 102mm throttle-body bore with increased horsepower and throttle response, making it relevant to LS1, LS2, and LS6 builds seeking both parts together.

The kit combines the LSXr intake and Big Mouth 102mm throttle body, so buyers get the two named airflow components in one listed package rather than selecting the throttle body separately. Its description attributes horsepower and throttle-response gains to improved manifold flow and the 102mm bore. It also states that the billet throttle blade decreases deflection, while the polymer manifold reduces heat soak. The supplied kit facts do not detail vehicle fitment beyond the LS1/2/6 title application.

Skip it if you need a stated low-height forced-induction layout; Holley 300-679 LS3 Lo-Ram Manifold Kit is specified for that packaging use.

This kit suits an LS1, LS2, or LS6 buyer who wants the LSXr manifold and its matching 102mm Big Mouth throttle body together. Its large-bore combination is the key boundary when planning the rest of the intake path.

Listed on Amazon as: FAST LSXr 102mm LS1/2/6 Intake Manifold + 102mm Big Mouth Billet Throttle Body Kit

#7

7. Htostar Racing 92mm

• Weight: 20.7 lb
• Package Dimensions: 23.5 x 23.5 x 15.5 in

Best for: Cable-throttle cathedral-port swaps.

Why it ranks #7: Its 92mm inlet and cathedral-port compatibility cover LS1, LS2, and LS6 applications; the listing gives no boost-specific design information.

A 92mm inlet and drive-by-cable throttle-body specification distinguish this Htostar Racing manifold for cathedral-port LS builds retaining cable control. Its listed compatibility spans several LS engines and named Chevrolet, Cadillac, Pontiac, and Saab applications, giving buyers a concrete starting point for checking their engine and vehicle configuration.

The listing identifies cathedral-port LS-based engines, including 4.8L, 5.3L, LS1, LS2, and LS6, and specifies a drive-by-cable throttle body. That combination helps narrow the choice for a compatible cable-controlled setup rather than an unspecified electronic-throttle arrangement. The 92mm inlet and 210mm height are useful planning dimensions for the intake path and under-hood space. Listed vacuum ports include 1/4NPT and 1/8NPT, with plugs, supporting the stated port connections.

Skip it if you need a manifold explicitly listed for LS3/L92 rectangle-port heads; Holley 300-679 names those heads and forced-induction use.

This suits a cathedral-port LS swap that retains drive-by-cable control and can accommodate its stated 210mm height. Use the listed engine and vehicle applications as a fitment starting point, not a substitute for checking the specific configuration.

Listed on Amazon as: For LS Intake Manifold Compatible with LS1 LS2 LS6 of cathedral port heads with Drive by Cable Throttle Body Compatible with Chevy Cadillac Pontiac Aluminum (92mm)

#8

8. POSENG 92mm

• Weight: 17.11 lb
• Package Dimensions: 23.23 x 13.78 x 9.92 in

Best for: Cathedral-port builds with injector planning.

Why it ranks #8: This 92mm cathedral-port manifold lists several LS displacements and models, but injector changes may be needed and boost fitment is not specified.

A broad listed engine range, from 4.8L and 5.3L applications through LS1, LS2, and LS6, makes this POSENG 92mm intake relevant to varied cathedral-port builds. Its injector guidance is especially important: LS1/LS6 injectors are specified, while other injectors can require bracket modification or spacers.

The listing names cathedral-port LS-based engines and multiple Chevrolet, Pontiac, Cadillac, and Saab applications, giving buyers substantial stated coverage to compare with their build. Its 92mm opening defines the throttle-body size category, while the injector note directly affects installation planning: LS1/LS6 injectors are specified, and others may need bracket drilling or spacers. That distinction can shape parts selection and fitting work before assembly. The supplied facts do not state a manifold height or detailed throttle-control type.

Skip it if you want a stated 102mm inlet; FAST LSXr 102mm Intake Manifold for LS1, LS2, and LS6 lists that larger opening.

Choose this when its cathedral-port engine coverage and 92mm opening match the build, and plan injector fitment before installation. The supplied injector note makes it particularly important to account for non-LS1/LS6 injector mounting.

Listed on Amazon as: Intake Manifold for LS Cathedral Port Heads for LS1 LS2 LS6 LS Engines Compatible with Chevy 4.8 5.3 5.7 6.0 HTRACING (Black 92MM)

#9

9. Michigan Motorsports XS LS3

Best for: Rectangle-port builds needing hood space.

Why it ranks #9: The 112mm manifold is for rectangle-port LS engines and moves fuel rails inside the manifold; its description does not identify boost use.

Moving the fuel rails inside the manifold is the defining architectural feature of Michigan Motorsports’ XS LS3 112mm intake, with the stated aim of maximizing available under-hood space. Its listed 2007–2015 rectangle-port engine coverage centers it on LS3, L99, L76, L77, L92, L96, LY6, L94, and L9H applications.

The 112mm inlet sets this manifold apart for rectangle-port LS builds, while the internal fuel-rail placement addresses space that the listing says conventional rail positioning would occupy. Together, those details give buyers two practical planning points: the throttle-body opening and the intake’s under-hood layout. The compatibility list specifies 2007–2015 rectangle-port engines, including LS3 and L92 families, so cathedral-port applications are outside the stated fitment. The supplied information does not provide manifold height or detailed installation instructions.

Skip it if you need a cathedral-port 102mm setup; FAST LSXr 102mm Intake Manifold for LS1, LS2, and LS6 is listed for those heads.

Consider this for a listed rectangle-port LS application where internal rail placement and a 112mm intake suit the build. Because no manifold height is supplied, plan clearance using verified dimensions for the specific engine bay.

Listed on Amazon as: Performance Design LS3 XS 112mm Intake Manifold for Rectangle Port LS Engines L99 L76 L77 L96 L92 LY6

#10

10. BTR Trinity LS3

• Weight: 22 lb
• Package Dimensions: 26 x 12 x 12 in

Best for: Short-runner rectangle-port builds.

Why it ranks #10: This short-runner rectangle-port manifold requires the FRK-02 fuel rail kit, and the listing does not describe forced-induction application.

A short-runner, three-piece design gives the BTR Trinity a specific intake layout for LS3 and other rectangle-port LS engines. The listing also states that it requires the newer FRK-02 fuel rail kit, making rail selection a central planning detail rather than an afterthought for buyers assembling a compatible intake system.

The short runners define the manifold’s stated architecture, while its three-piece construction is described as allowing the ultimate configuration without further detail on specific configurations. Its rectangle-port application includes LS3, L99, L92, and L96 engines, narrowing the intended head family. Fuel-rail planning is essential because the manifold requires the new-style FRK-02 kit. For 2010–2015 Camaro SS applications, the listing warns that a stock throttle body will not clear and names compatible alternatives.

Skip it if you need a manifold with listed 112mm sizing and internal rails; Michigan Motorsports Performance Design LS3 XS 112mm Intake Manifold specifies both.

This suits a rectangle-port LS build using the required FRK-02 fuel rail kit, especially where the short-runner, three-piece format fits the plan. Camaro SS owners from 2010–2015 must account for the stock-throttle-body clearance warning.

Listed on Amazon as: BTR Trinity Intake Manifold LS3/Rectangle Port -Black- Brian Tooley Racing LS3 L99 L92 L96 TRA-3-BLK-P105-V2 (Intake and Fuel Rails)