Best Intake For Ls1: Compare Manifolds and Swap Kits

#1 · Best Overall

1. FAST LSXr 102mm Manifold

• Weight: 19.45 lb

Best for: Porting-focused LS power builds.

Why it ranks #1: The cathedral-port LS manifold has a 102mm inlet, removable runners, and stated compatibility with OEM or aftermarket 90mm and 92mm throttle bodies.

A removable-runner design makes the FAST LSXr 102mm intake especially relevant to builders who want access for disassembly and porting. Its longer runners and larger-than-stock inlet are specified to add horsepower while maintaining low-RPM torque, balancing airflow goals with everyday engine-speed usability.

The 102mm inlet is matched particularly well to FAST’s Big Mouth 102mm throttle body, while the manifold can also be used with OEM or aftermarket 90mm and 92mm throttle bodies. That range gives builders more intake choices, though the inlet dimensions still matter when matching parts. Longer, less restrictive runners are described as supporting added power without sacrificing low-RPM torque. The polymer construction is lighter than aluminum and runs cooler, and the removable runners make future porting or service access easier.

Skip it if you need a carbureted manifold; JGhyperX 300-130 is listed as a carbureted dual-plane intake.

This fits cathedral-port LS owners seeking a serviceable, porting-friendly EFI manifold and airflow capacity for a 102mm throttle body. Consider throttle-body sizing and intake-system plans before settling on the larger inlet.

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

#2 · Best Injector Fit

2. GSTP 92mm EFI Manifold

• Weight: 17.51 lb
• Package Dimensions: 21.4 x 15.5 x 11 in

Best for: LS1 injector direct-fit builds.

Why it ranks #2: Its 92mm inlet, T6061 aluminum construction, and upgraded rail bracket are specified to accept original LS1, LS6, or LS2 injectors without spacers.

An upgraded fuel-rail bracket that accepts original LS1, LS6 or LS2 injectors without additional spacers or modifications is the key practical feature of this GSTP manifold. Its 92mm inlet and cathedral-port Gen III/IV application define the surrounding intake setup.

The 1/8-inch-thick T6061 aluminum manifold is listed for LS-based engines from 4.8L to 6.0L with cathedral-port heads. Its 92mm inlet and 210mm height offer concrete dimensions for throttle-body selection and engine-bay planning. Vacuum ports in 1/4NPT and 1/8NPT sizes are supplied with plugs, while the rear M12 x 1.25 MAP port and 8AN fuel-rail fittings identify connection points to account for during installation. The injector bracket avoids extra spacer or modification work for the listed original injectors.

Skip it if you need a carbureted intake; JGhyperX 300-130 is explicitly listed as a carbureted dual-plane manifold.

This suits an EFI cathedral-port LS builder retaining original LS1, LS6 or LS2 injectors and planning around its specified ports and dimensions. Check clearance and connection needs against the existing setup.

Listed on Amazon as: For LS LS1 LS2 LS6 Intake Manifold with Cathedral Port Compatible with Chevy 4.8 5.3 5.7 6.0 L (92MM Silver)

#3 · Cable-Drive Pick

3. POSENG 92mm Cable Manifold

• Weight: 20.5 lb
• Package Dimensions: 23.5 x 15.5 x 11 in

Best for: Cable-drive LS intake kits.

Why it ranks #3: This 92mm cathedral-port manifold explicitly fits four-bolt cable-drive setups; its listing cautions that it is not for drive-by-wire.

A 92mm throttle-body kit paired with an explicit cable-drive-only restriction makes this POSENG manifold a targeted option for cathedral-port LS builds. Its listed engine range spans 4.8L through 6.2L applications, while the cable-throttle note helps buyers screen out incompatible drive-by-wire plans before installation.

The manifold is listed for Chevrolet small-block Gen III/IV LS engines with cathedral-port heads, including LS1, LS2 and LS6 applications. The seller specifies a four-bolt intake with cable drive only and says it is not for drive-by-wire, a critical control-system boundary for a swap. Injector fit also needs attention: LS1/LS6 injectors are listed, while other injectors may require bracket drilling or spacers. That makes injector choice part of installation planning, not an afterthought.

Skip it if you have a drive-by-wire throttle; Htostar Racing IM-1011A-S-JL is listed for drive-by-cable configurations.

Choose this for a cathedral-port LS build using cable throttle and LS1 or LS6 injectors. Buyers using other injectors should account for possible bracket modification or spacers, and drive-by-wire projects should look elsewhere.

Listed on Amazon as: For LS LS1 LS2 LS6 Intake Manifold Compatible with Chevy 4.8 5.3 6.0 6.2 with 92mm Throttle Body Kits HTRACING

#4

4. Htostar 92mm Manifold

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

Best for: Cable-throttle LS builders.

Why it ranks #4: The cathedral-port manifold specifies a 92mm inlet and drive-by-cable throttle body, with vacuum ports and listed LS1 compatibility.

A 92mm inlet paired with a taller 210mm manifold gives this Htostar Racing intake a clear fit profile for cathedral-port LS builds using cable throttle. Its listed coverage includes LS1, LS2, LS6 and several Chevrolet, Cadillac and Pontiac applications, helping narrow the shortlist for compatible swaps and replacements.

The 1/8-inch-thick aluminum construction gives buyers a defined material and thickness to consider when planning an installation. Separate 1/4NPT and 1/8NPT vacuum ports, supplied with a plug, provide connection options for a build’s vacuum plumbing. The 92mm opening and 210mm height are important packaging dimensions to check against the throttle body and available engine-bay clearance. Compatibility is specifically described for cathedral-port heads and drive-by-cable throttle, so the application list does not make it a universal LS choice.

Skip it if you need a carbureted setup; JGhyperX 300-130 is specifically listed as a carbureted dual-plane manifold.

This suits a cable-throttle LS builder with cathedral-port heads who can accommodate the taller 210mm profile. Check available engine-bay space and intended vacuum connections before choosing it for a specific vehicle.

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)

#5 · Large-Inlet Pick

5. POSENG 102mm Manifold

• Weight: 16.87 lb
• Package Dimensions: 23.3 x 14.1 x 10 in

Best for: 102mm cathedral-port LS swaps.

Why it ranks #5: Its 102mm cathedral-port manifold is listed for LS1, LS2, and LS6 original engines, though the listing notes additional modifications may be required.

A 102mm inlet gives this POSENG cathedral-port manifold a clear role in LS builds that call for a large throttle-body opening. Its listed applications cover LS1, LS2 and LS6 heads and a range of Chevrolet, Pontiac, Cadillac and Saab models.

The stated cathedral-port LS1/LS2/LS6 application provides the main engine-fit boundary, while the model list gives concrete vehicle references including Corvette, Firebird, CTS V-series, SSR, TrailBlazer SS, GTO and Saab 9-7X Aero. The 102mm inlet is a key matching dimension for the throttle body and intake plumbing. Because the listing notes that additional modifications may be required, buyers should treat vehicle fit as a planning step rather than assuming a direct installation for every listed application.

Skip it if you need a stated 92mm inlet and cable-drive configuration; Htostar Racing IM-1011A-S-JL lists those specifications.

This is for a cathedral-port LS builder whose setup calls for a 102mm inlet and whose vehicle appears in the supplied application list. Allow for possible modifications during fitment planning.

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 102MM)

#6

6. YIUIY Low-Profile Manifold

• Weight: 18.41 lb
• Package Dimensions: 21.4 x 15.3 x 11 in

Best for: Low-profile fabricated EFI builds.

Why it ranks #6: This fabricated, TIG-welded sheet-aluminum EFI manifold fits cathedral-port LS1, LS2, and LS6 heads and is explicitly described as low profile.

A low-profile 102mm cathedral-port manifold made from TIG-welded 1/8-inch T6061 sheet aluminum gives this YIUIY option a distinct combination of packaging and construction. Its listed LS1, LS2 and LS6 compatibility makes it relevant to EFI-oriented LS builds where manifold height matters.

The low-profile form is useful to consider when engine-bay packaging limits the available intake height, while the 102mm specification identifies the inlet size to match with the rest of the induction system. TIG-welded fabrication from 1/8-inch T6061 sheet aluminum gives buyers concrete construction details for evaluating the manifold. The application is stated for cathedral-port LS1/LS2/LS6 heads and Chevrolet small-block Gen III/IV LS-based engines. Check the vehicle-specific model list and surrounding components when planning the installation.

Skip it if you need a carbureted manifold; JGhyperX 300-130 is specifically listed for carbureted LS applications.

This suits an LS builder seeking a low-profile fabricated manifold for cathedral-port heads and a 102mm induction layout. Confirm the available space and throttle-body arrangement against the vehicle and build plan.

Listed on Amazon as: For LS Intake Manifold Low Profile Cathedral Port 102mm Compatible with Chevy GMC Pontiac LS1 LS2 LS6 Sheet Metal Fabricated EFI (Black)

#7

7. JGhyperX Hi-Ram EFI Manifold

• Weight: 31.7 lb

Best for: High-RPM EFI LS builds.

Why it ranks #7: The cathedral-port EFI manifold includes fuel rails and a 92mm throttle-body bore, but its stated operating range begins at 3,500 rpm.

A stated 3,500–8,000 RPM operating range sets this JGhyperX Hi-Ram apart for builders targeting a high-revving EFI LS combination. The 92mm throttle-body bore and cathedral-port LS1, LS2 and LS6 fitment give the application a defined engine and induction profile.

This aluminum EFI manifold is listed for 5.7L and 6.0L LS V8s with cathedral-port heads, so head style is a key fit consideration. Its 92mm throttle-body bore provides a specific sizing target for the intake setup, while the 3,500–8,000 RPM range signals the intended operating band. Included fuel rails are machined for -8 AN O-ring male fittings, which helps specify fuel-line connection planning. The package listing includes the manifold, fuel rail kit and some pictured parts.

Skip it if you want a dual-plane carbureted setup with a lower stated range; JGhyperX 300-130 lists 1,500–6,500 RPM.

This is aimed at an EFI LS builder planning a cathedral-port combination that will use the stated high-RPM band and -8 AN rail connections. It is less suited to a project centered on low-speed operation.

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

#8

8. JGhyperX Carb Intake Manifold

• Weight: 15.22 lb

Best for: Dual-plane carbureted LS swaps.

Why it ranks #8: This dual-plane cathedral-port manifold fits LS1 engines, but its carbureted design suits a different fuel setup than an EFI replacement.

A dual-plane layout with a listed 1,500–6,500 RPM range makes this JGhyperX manifold a clearly specified carbureted path for cathedral-port LS engines. Its application spans LS1, LS2 and LS6 V8s as well as listed Gen III/IV engine sizes.

This is a carbureted aluminum manifold, not an EFI intake, and its dual-plane style and 1,500–6,500 RPM basic range help buyers judge whether it matches their engine use. The listed compatibility includes cathedral-port LS1, LS2 and LS6 engines, plus 4.8L, 5.3L and 6.0L applications. At 5.60 inches tall, its manifold height is a relevant packaging measurement for an engine bay or hood clearance plan. The listing also states EGR: No, which matters when planning the emissions and plumbing configuration.

Skip it if you need EFI with fuel rails; JGhyperX 300-122 is an EFI Hi-Ram manifold with a fuel rail kit.

Choose this for a cathedral-port LS swap using a carburetor and a dual-plane setup within the stated RPM range. Its height and no-EGR listing should factor into packaging and system planning.

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

#9

9. RiAiCiING LS Swap Intake Kit

Best for: Flexible LS swap routing.

Why it ranks #9: This is a universal 4-inch cold-air swap kit, not an intake manifold; it lists broad LS compatibility and driver- or passenger-side filter placement.

Driver- or passenger-side filter placement is the defining feature of this RiAiCiING cold-air intake, letting swap builders choose a routing side around their project’s engine-bay layout. Its universal listing covers a broad set of LS-family engines and specifically notes a 5.7L LS1-swapped 1971 Chevelle example.

The kit is listed for LS1, LS2, LS3, LQ4, LQ9, LY6 and 4.8L through 6.0L engines, making it relevant across varied LS swap projects. Its stated goal of maximizing clearance between the radiator and accessory pulleys connects the filter-routing choice to real packaging constraints. Speed-density and round-MAF setups are supported; however, MAF installation requires additional couplers and clamps. That detail affects parts planning, while the choice of filter side can help accommodate a particular swap layout.

Skip it if you want an EFI manifold rather than a cold-air intake; FAST LSXr 102mm is an LS intake manifold option.

This is a practical candidate for LS swap builders who need filter-side flexibility and radiator or pulley clearance. Choose it with the engine and sensor setup in mind, and source the extra couplers and clamps for MAF use.

Listed on Amazon as: 4'' LS Swap Cold Air Intake for LS1 LS2 LSX Camaro Chevelle

#10

10. LDMINDA LS Swap Intake Kit

• Weight: 5.13 lb
• Package Dimensions: 18.31 x 14.57 x 7.76 in

Best for: LS swap cold-air routing.

Why it ranks #10: The 4-inch cold-air kit lists broad LS swap compatibility, but it is an air-inlet system rather than the LS1 intake manifold most searchers need.

A four-inch cold-air intake kit supplied with necessary hardware gives the LDMINDA option a straightforward starting point for LS swap airflow routing. Its listed coverage includes LS1, LS2, LS3, LQ4, LQ9, LY6 and 4.8L through 6.0L engines across varied swap projects.

The kit is described as providing a less restrictive airflow path that brings more cool, oxygen-rich air into the engine, with the stated aim of increasing horsepower and torque. Its design targets clearance between the radiator and accessory pulleys, a useful packaging consideration in swaps where those components compete for space. The 4-inch intake size and included hardware define what is supplied, while the broad engine list helps frame compatibility. This is a cold-air intake kit, not an intake manifold.

Skip it if you need a manifold rather than an intake pipe kit; FAST LSXr 102mm is a listed LS intake manifold.

This suits a swap builder seeking a four-inch cold-air intake kit and clearance around the radiator and accessory pulleys. Match the pipe size and routing to the particular engine-bay layout before selecting it.

Listed on Amazon as: LS Swap Cold Air Intake kit Compatible with Camaro Chevelle GTO Monte Carlo Caprice LS1 LS2 LSX LQ4 LQ9 Restomod