Best Ls Intake Manifold for Cathedral-Port, Rectangle-Port, and Carb Builds

#1 · Best Overall

1. FAST LSXr 102mm Intake

• Weight: 19.45 lb

Best for: Modular polymer LS upgrade.

Why it ranks #1: Its 102mm inlet and longer runners target airflow for LS1, LS2, and LS6, while the modular design and stated CARB approval add useful specificity.

Its removable, modular runners are the clearest differentiator, letting LS builders disassemble the manifold for porting rather than treating it as a sealed assembly. FAST pairs that serviceable layout with a 102mm inlet and longer runners, aimed at airflow gains while maintaining low-RPM torque on compatible LS1, LS2, and LS6 applications.

The 102mm inlet suits a FAST Big Mouth 102mm throttle body, while the listing also allows OEM or aftermarket 90mm and 92mm throttle bodies, giving builders options when retaining existing induction hardware. Longer runners and a larger inlet than stock are intended to improve airflow without sacrificing low-RPM torque. Its advanced polymer construction is lighter than aluminum and runs cooler, and removable runners make internal porting access more straightforward.

Skip it if you need a cathedral-port manifold explicitly listed for 4.8L and 5.3L engines; Htostar Racing lists those engine sizes and cable-drive fitment.

This is a strong match for LS1, LS2, or LS6 owners seeking a portable, serviceable intake with a large inlet and runner access. Its listed LS applications and throttle-body sizing should guide fitment choices.

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

#2 · Best Cable-Throttle Fit

2. Htostar 102mm Cable Intake

• Weight: 20.2 lb

Best for: Cable-throttle cathedral-port builds.

Why it ranks #2: It explicitly fits cathedral-port LS engines with cable drive, has a 102mm inlet, and identifies drive-by-wire as incompatible.

A 102mm inlet paired with a cable-drive-only layout is the defining combination here, giving compatible cathedral-port LS builds a large throttle opening without switching to drive-by-wire. Htostar Racing lists compatibility with 4.8L, 5.3L, LS1, LS2, and LS6 engines, plus a range of Chevrolet, Cadillac, Pontiac, and Saab applications.

The 102mm/4.02-inch inlet provides the specified opening for a large throttle-body setup, while the 210mm height is an important packaging measurement to consider under the hood. Its stated compatibility centers on cathedral-port heads and a four-bolt cable-drive intake, so buyers can narrow fitment by engine layout before installation. The listing names several vehicle applications, but explicitly excludes drive-by-wire, making throttle actuation the key compatibility boundary for a swap or replacement.

Skip it if you need a drive-by-wire manifold; the FAST LSXr supports specified OEM or aftermarket 90mm and 92mm throttle bodies as well as its 102mm opening.

This suits builders using a cathedral-port LS with cable actuation who want a 102mm inlet and can accommodate the listed 210mm height. Check the engine and throttle-control arrangement carefully; this manifold is not for drive-by-wire.

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 (102mm)

#3

3. POSENG 102mm Intake Kit

• Weight: 9.23 kg

Best for: Cable-drive intake and throttle kit.

Why it ranks #3: This cathedral-port manifold listing specifies a 102mm throttle-body kit and cable-drive-only fitment, making its configuration unusually clear.

The listed 102mm throttle-body kit configuration is the main draw for cable-operated cathedral-port LS builds, combining the manifold with throttle-body and TPS components according to its specification. POSENG names compatibility with 4.8L through 6.2L LS-based engines and several Chevy applications, but limits the setup to four-bolt cable drive rather than drive-by-wire.

A 102mm throttle-body specification gives buyers a matched large-opening direction for the intake, while the listed black manifold, throttle body, and TPS combination can help consolidate component selection. Fitment is centered on cathedral-port LS engines and cable actuation, with named vehicles including Corvette, Firebird, CTS V-series, SSR, and TrailBlazer SS applications. The listing notes that additional modifications may be required, so engine configuration and installation details remain important before committing to the kit.

Skip it if you want a 92mm cathedral-port intake for LS1 or LS6 injectors; the POSENG black 92mm model lists those injector types.

This fits buyers assembling a cable-drive cathedral-port setup who value the listed manifold, throttle body, and TPS combination. Verify the engine configuration and account for the listing’s note that additional modifications may be required.

Listed on Amazon as: Intake Manifold Compatible with Chevy 4.8 5.3 6.0 6.2 LS LS1 LS2 LS6 with 102mm Throttle Body Kits HTRACING

#4 · Best 92mm Option

4. POSENG 92mm Intake

• Weight: 17.11 lb

Best for: 92mm cathedral-port replacement.

Why it ranks #4: The 92mm version serves cathedral-port LS1, LS2, and LS6 engines, and the listing provides injector guidance, including possible bracket changes for other injectors.

A 92mm inlet distinguishes this POSENG manifold from the larger 102mm options, giving cathedral-port LS builders a smaller specified opening to plan around. Its listed engine coverage includes 4.8L, 5.3L, 5.7L, and 6.0L configurations as well as LS1, LS2, and LS6, with multiple Chevrolet and Pontiac applications identified.

The 92mm size gives a concrete throttle-body opening to match when selecting induction components, and the listed cathedral-port compatibility spans a broad set of LS engine codes. POSENG specifies LS1/LS6 injectors; other injector types require modifying the mounting bracket, such as drilling extra holes, or using spacers. That caveat makes injector configuration an important pre-installation check, particularly for swaps that retain existing fuel-system hardware.

Skip it if you need a 102mm opening for a larger throttle body; the PUZZLEDEER manifold is listed with a 102mm inlet.

This is suited to cathedral-port LS owners whose build calls for a 92mm opening and listed engine coverage. Check injector type before installation, since non-LS1/LS6 injectors call for bracket changes or spacers.

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)

#5

5. PUZZLEDEER 102mm Intake

• Weight: 17.31 lb

Best for: 102mm cathedral-port LS builds.

Why it ranks #5: Its 102mm opening and listed 4.8L through 6.0L fit range suit cathedral-port builds, though the model and part-number details are inconsistent.

A 102mm opening on a black manifold is the concrete fitment feature for this PUZZLEDEER option, which is listed for cathedral-port LS applications. Its named engine range includes 4.8L, 5.3L, 5.7L, and 6.0L configurations, providing a specified starting point for builders comparing intake size and engine family.

The 102mm inlet identifies the throttle-body opening to match, while the listed cathedral-port compatibility narrows the cylinder-head family this manifold serves. PUZZLEDEER names Corvette, Firebird, Trans AM, and other applications in its fitment information, helping buyers use vehicle and engine details to screen compatibility. Its stated function is distributing incoming air among cylinders; installation planning should therefore begin with confirming the head style and intended throttle-body size rather than relying on vehicle name alone.

Skip it if you need cable-drive-only compatibility stated explicitly; Htostar Racing lists a 102mm cathedral-port manifold specifically for cable drive.

Consider this for a 102mm cathedral-port LS project in one of the listed engine sizes, using the stated fitment details as a starting point. The supplied information does not specify throttle-actuation type, so that remains a key boundary.

Listed on Amazon as: LS LS1 LS2 LS3 LS6 Intake Manifold Compatible for Chevy 4.8L 5.3L 5.7L 6.0L Intake Manifold for LS Cathedral Port Heads 102mm Black

#6 · Best Rectangle-Port Option

6. Michigan Motorsports LS3 XS

Best for: Rectangle-port high-ram projects.

Why it ranks #6: It is specifically listed for 2007–2015 rectangle-port engines, including LS3, L99, L76, L77, L92, and L96 applications.

Fuel rails moved inside the manifold set this XS intake apart, reclaiming under-hood space around the runner design for rectangle-port LS builds. Michigan Motorsports lists a 112mm inlet and compatibility with 2007–2015 LS3, L99, L76, L77, L92, L96, LY6, L94, and L9H engines, clearly targeting a different head family than cathedral-port options.

The 112mm inlet gives this manifold a larger specified opening than the 102mm options in this roundup, while the internal fuel-rail placement addresses packaging around the runners. Its rectangle-port fitment spans several named Gen IV applications, so engine and head identification matter before purchase. The manufacturer says the architecture was developed to maximize available space under the hood; buyers should still account for their own engine-bay layout and fuel-rail arrangement during installation planning.

Skip it if you have cathedral-port heads; FAST LSXr is listed for LS1, LS2, and LS6 applications instead of this rectangle-port manifold.

Choose this for a rectangle-port LS project among the listed engine families when internal fuel-rail placement and the 112mm inlet suit the build. It is not the right head-port match for cathedral-port engines.

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

#7

7. DEEPMOTOR 102mm High-Ram

• Weight: 20.8 lb

Best for: High-RPM EFI race builds.

Why it ranks #7: Its sheet-metal-style EFI design specifies a 9.65L plenum, 102mm opening, fuel rails, and a MAP sensor port for high-RPM builds.

A 9.65L plenum paired with a 102mm throttle-body opening defines this DEEPMOTOR sheet-metal-style EFI intake, aimed at high-RPM LS performance applications. Its listed fuel rails and MAP sensor port add specific EFI integration points, while TIG-welded 3mm T6061 aluminum construction supplies the stated fabrication material and thickness.

The large 9.65L plenum is intended to support airflow in high-horsepower, high-RPM use, while the 102mm opening accommodates a large throttle-body setup. Included fuel rails and a MAP sensor port provide named EFI interfaces that can help organize component planning around the manifold. TIG-welded 3mm T6061 aluminum construction is the specified fabrication approach. The supplied information does not identify engine or head-port compatibility, so confirm those details before selecting it for a particular LS build.

Skip it if you need confirmed LS1, LS2, or LS6 cathedral-port fitment; FAST LSXr explicitly lists those engines and cathedral-port applications.

This targets EFI race projects prioritizing a large plenum, 102mm opening, and listed sensor and fuel-rail provisions. Its supplied details do not state head-port compatibility, so confirm that boundary before planning installation.

Listed on Amazon as: 102mm LS Intake Manifold for LS1 LS2 LS6 – Sheet Metal Style EFI Race Intake w/Fuel Rails, MAP Sensor Port & 9.65L Large Plenum Black

#8

8. Dokili 300-132 Carb Intake

• Weight: 12.12 lb

Best for: Carbureted cathedral-port conversion.

Why it ranks #8: This carbureted LS manifold fits cathedral-port LS1, LS2, and LS6 heads and replaces the listed 300-132 part number.

Its carbureted intake format is the key distinction for LS builders moving away from an EFI manifold, with stated compatibility for LS1-, LS2-, and LS6-style cathedral-port heads. Dokili lists 4.8L, 5.3L, 5.7L, and 6.0L configurations and names applications such as Camaro, Corvette, and Cadillac CTS V8.

The carbureted configuration makes this a different induction path from the EFI manifolds in the roundup, so it suits builds selecting a carburetor-based setup. Its cathedral-port compatibility covers several Gen III and IV LS engine sizes, while the named vehicle applications help narrow the search to specific platforms. The title calls it dual plane, although the supplied feature text also uses single-plane wording; verify the intended manifold configuration before planning parts or installation.

Skip it if you need an EFI intake with fuel rails; DEEPMOTOR DM-3032 is listed as a sheet-metal-style EFI manifold with fuel rails.

This is for a carbureted cathedral-port LS conversion across the listed engine sizes and vehicles. Resolve the listing’s conflicting plane descriptions before choosing companion parts or finalizing the installation.

Listed on Amazon as: 300-132 LS Dual Plane Intake Manifold Cathedral Port Carbureted

#9

9. JGhyperX 300-130 Carb Intake

• Weight: 15.22 lb

Best for: Dual-plane carbureted LS setup.

Why it ranks #9: Its dual-plane carbureted design lists cathedral-port LS fitment, a 1,500–6,500 RPM range, and a 5.60-inch manifold height.

A specified dual-plane layout with a 1,500–6,500 RPM operating range makes this JGhyperX manifold a defined option for carbureted cathedral-port LS builds. Its listing covers LS1, LS2, and LS6 engines, plus 4.8L, 5.3L, and 6.0L Gen IV configurations, and gives a 5.60-inch manifold height for packaging checks.

The dual-plane design and stated 1,500–6,500 RPM range give builders concrete operating and configuration details when planning a carbureted setup. Its 5.60-inch height helps assess under-hood clearance, while the aluminum construction and complete-intake description clarify the listed material and assembly scope. Fitment is for cathedral-port LS engines; the listing specifies no EGR. Use the engine family, carbureted layout, and available clearance together when evaluating installation compatibility.

Skip it if you need an EFI sheet-metal manifold with fuel rails; DEEPMOTOR DM-3032 lists those EFI provisions and a 102mm opening.

This suits cathedral-port LS owners selecting a carbureted dual-plane intake and needing a published operating range and height. Its carbureted format and no-EGR specification are important boundaries for the rest of the build.

Listed on Amazon as: 300-130 LS Cathedral Port Carb Intake Manifold for LS1 V8 Silver

#10

10. APFAITH 300-132 Carb Intake

• Weight: 12.47 lb

Best for: Single-plane carbureted LS builds.

Why it ranks #10: This single-plane carbureted manifold is intended for cathedral-port LS engines, but the listing conflicts by calling it both single-plane and dual-plane.

The single-plane carbureted format is this APFAITH manifold’s clearest use-case feature, aimed at builders choosing a carburetor rather than an EFI intake. Its stated fitment covers GM LS1, LS2, and LS6-style cathedral-port heads and 4.8L, 5.3L, 5.7L, and 6.0L V8 configurations.

Because the listing identifies a single-plane carbureted manifold, buyers can plan around that induction approach instead of treating it as an EFI replacement. The specified cathedral-port compatibility spans several common LS engine sizes, making head style and engine family the central fitment checks. The listing also references part number 300-132 and says some pictured parts are included; it separately describes fitment as dual plane, conflicting with the title and package description, so confirm the intended configuration before ordering.

Skip it if you need a stated dual-plane design and operating RPM range; JGhyperX 300-130 lists both for its carbureted manifold.

This may suit a cathedral-port LS carbureted build within the listed engine range, provided a single-plane design is intended. Resolve the conflicting plane description before coordinating this manifold with other components.

Listed on Amazon as: Carbureted Intake Manifold Aluminum Single Plane 300-132 Small Block LS 6.0