Best Low Profile Ls Intake Manifold for Cathedral and Rectangle Ports

#1 · Best Overall

1. Htostar Racing LS3 Manifold

• Package Dimensions: 21.4 x 15.4 x 10.6 in
• Weight: 18.26 lb

Best for: Rectangle-port LS3 applications.

Why it ranks #1: Its stated 6.5-inch height and 102mm inlet directly suit low-profile LS3 builds; the listing specifies rectangle-port fit and an approximate 1,800–6,500 RPM range.

A 102mm four-bolt throttle-body inlet and 165mm height distinguish this low-profile LS3 manifold, giving rectangle-port builders specific opening and height dimensions to consider. Htostar Racing lists compatibility with the LS3 6.2L and other Gen III/IV LS-based engines, with a stated 1800–6500 RPM range.

The 102mm inlet is specified for a four-bolt throttle body, making that interface a key selection check for an LS3 build. Its 165mm height and 490mm length provide packaging dimensions, while the stated 1800–6500 RPM range describes its intended operating band. The manufacturer also lists a 30 psi pressure rating and notes that additional modifications may be required, giving buyers important constraints to weigh alongside rectangle-port compatibility.

Skip it if you need confirmed alignment with aftermarket heads; Pateyney's manifold lists stock/OEM standard-deck specifications instead.

Consider this Htostar Racing option for a rectangle-port LS3 build that uses a 102mm four-bolt throttle body and suits its listed dimensions. Verify head alignment and allow for possible modifications before committing to the installation.

Listed on Amazon as: Low Profile For LS3 Intake Manifold EFI Compatible with LS Rectangle Port Head Aluminum (102mm Silver)

#2 · Best Included Rails

2. Pateyney LS1 Cathedral Manifold

• Package Dimensions: 20.8 x 15.3 x 11.8 in
• Weight: 18.26 lb

Best for: Rail-equipped cathedral-port builds.

Why it ranks #2: This explicitly low-profile 102mm manifold lists a 7-inch height, cathedral-port fit, MAP sensor port, and included fuel rails for a defined setup.

Included fuel rails and a MAP sensor port give this Pateyney manifold useful hardware details for a cathedral-port LS1, LS2, or LS6 project. Its listed 7-inch height and 2,200–6,800 RPM operating range help buyers assess both engine-bay packaging and the stated operating window.

The manifold is specified for stock/OEM standard-deck blocks and cathedral-port heads, which gives buyers a defined starting point for fitment checks. Multi-port injection and included fuel rails clarify the fuel-system layout, but the listing also says an aftermarket fuel rail is required, a detail to resolve before assembly. Four machined supplemental bosses and included, non-removable runners add further information for planning components and service access.

Skip it if you need injectors included; Htostar Racing's LS3 rectangle-port manifold may suit a different head configuration, but lists no injector inclusion either.

This Pateyney manifold suits buyers planning a stock-deck, cathedral-port LS build with multi-port injection and a 2,200–6,800 RPM stated range. Resolve the fuel-rail requirement and source injectors separately before planning the installation.

Listed on Amazon as: Low Profile Intake Manifold LS1 LS2 LS6 102mm w MAP Sensor Port Fuel Rail (Silver)

#3 · Largest Plenum

3. DEEPMOTOR Gen II Manifold

• Package Dimensions: 24.5 x 16 x 12.75 in
• Weight: 22.6 lb

Best for: Large-plenum cathedral-port setups.

Why it ranks #3: Its stated 9.65L plenum and 102mm opening are specific airflow-oriented features; it also includes fuel rails and uses 1/8-inch T6061 sheet aluminum.

A stated 9.65L plenum volume paired with a 102mm throttle-bore opening defines this DEEPMOTOR manifold for cathedral-port LS1, LS2, and LS6 builds. Its listing also specifies fuel rails and a MAP sensor port, giving buyers useful intake and fuel-system details.

The 3mm (1/8-inch) T6061 sheet aluminum construction and 100% TIG-welded fabrication provide specific build details for a sheet-metal manifold. DEEPMOTOR says the runners have tapered tops intended to increase air velocity and distribute airflow more evenly across all eight cylinders. The 102mm bore and 9.65L plenum describe the intake layout, while included 3/8-inch fuel rail kits and the MAP sensor port inform component planning.

Skip it if you have rectangle-port LS3 heads; Holley's LS3 Ultra Low-Ram lists rectangle-port compatibility and a 105mm flange.

Choose DEEPMOTOR for a cathedral-port LS build seeking a 102mm opening, large stated plenum, and included fuel rail kits. Its listed LS1, LS2, and LS6 fitment sets a clear boundary for head selection.

Listed on Amazon as: LS1 LS2 LS6 102mm Low Gen II Intake Manifold 9.65L Big Volume w/MAP Sensor Port + Fuel Rails(Black)

#4

4. YIUIY Cathedral Manifold

• Package Dimensions: 21.81 x 15.98 x 10.71 in
• Weight: 18.48 lb

Best for: Cathedral-port 92mm builds.

Why it ranks #4: This low-profile fabricated option targets LS1, LS2, and LS6 cathedral-port heads and uses 1/8-inch T6061 sheet aluminum with TIG-welded construction.

A 92mm throttle-body opening paired with a low-profile cathedral-port layout gives LS1, LS2, and LS6 builders a fabricated intake option for tighter packaging. YIUIY specifies compatibility with Chevrolet small-block Gen III/IV LS-based engines and lists a range of Corvette, Firebird, and other applications.

The 1/8-inch T6061 sheet aluminum construction and TIG-welded fabrication provide concrete material and assembly details for buyers evaluating a fabricated manifold. Its 92mm opening identifies the throttle-body size to match in a build, while the stated cathedral-port compatibility narrows the cylinder-head applications. The listed vehicle coverage includes Corvette, Pontiac Firebird, Cadillac CTS V-series, and TrailBlazer SS examples, helping owners compare the stated fitment against their platform before selecting parts.

Skip it if you have rectangle-port LS3 heads; Htostar Racing's 102mm LS3 manifold lists rectangle-port compatibility.

Choose this YIUIY manifold for a low-profile 92mm setup using cathedral-port LS1, LS2, or LS6 heads. Its stated fitment is specific to those port shapes, so check your engine configuration against the listed applications before ordering.

Listed on Amazon as: For LS Intake Manifold Low Profile Cathedral Port 92mm Compatible with Chevy GMC Pontiac LS1 LS2 LS6 Sheet Metal Fabricated EFI (Silver)

#5 · Cable-Throttle Pick

5. Htostar Racing Cable Manifold

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

Best for: Cable-throttle cathedral-port builds.

Why it ranks #5: Its 92mm inlet, cathedral-port fit, and cable-throttle configuration make it a specific option for compatible builds; the stated height is 210mm.

A 92mm inlet paired with an explicitly stated drive-by-cable throttle-body setup gives this Htostar Racing manifold a clear niche among cathedral-port LS options. The listing covers LS1, LS2, and LS6 original engines and specifies a 210mm height for packaging checks.

Its 1/8-inch aluminum construction and 210mm height give builders material and clearance details to consider before installation. Vacuum ports are specified with 1/4NPT and 1/8NPT plugs, providing connection points while retaining the listed plugs. The 92mm inlet and stated drive-by-cable configuration help narrow throttle-body selection, and the vehicle list includes Corvette, Firebird, GTO, CTS V-series, and TrailBlazer SS applications.

Skip it if you need a 102mm rectangle-port LS3 manifold; Htostar Racing's LS3 102mm model lists that head configuration.

This Htostar Racing manifold fits buyers seeking a cable-throttle, 92mm setup for listed cathedral-port LS engines. Its 210mm height is a meaningful packaging boundary, so compare available engine-bay clearance before choosing it.

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)

#6

6. A-Team Performance LS Manifold

• Package Dimensions: 25.47 x 17.72 x 11.02 in
• Weight: 21.3 lb

Best for: 102mm LS3 fuel-rail builds.

Why it ranks #6: This fabricated LS manifold has a 102mm throttle-body opening, includes LS fuel rails, and is described as two inches taller than its standard design.

A 102mm throttle-body opening combined with included LS fuel rails gives this A-Team Performance manifold a substantial component package for compatible Gen III/IV LS builds. Its 2-inch-taller design is a defining packaging consideration, while the listing names LS3, L92, and L99 applications.

The 102mm opening provides a specific throttle-body interface to match, and the included LS fuel rails reduce the need to source that listed component separately. A-Team describes a fabricated aluminum sheet-metal construction with hand-done TIG welding, details useful when assessing its construction. The 2-inch-taller design may affect engine-bay clearance, so that dimension deserves attention during fit planning. The listing identifies Chevrolet small-block V8 Gen III/IV compatibility and LS3, L92, and L99 examples.

Skip it if you need the shortest listed packaging; Holley's LS3 Ultra Low-Ram is specifically identified as an ultra-low-ram manifold.

Consider A-Team Performance for a compatible LS build needing a 102mm opening and included fuel rails. The 2-inch-taller design is the key boundary: check engine-bay clearance and confirm the specific engine application.

Listed on Amazon as: A-Team Performance Fabricated LS Sheet Metal Intake Manifold – Silver, 102mm Throttle Body Opening & LS Fuel Rails – Compatible with GM Chevrolet Small Block V8 Gen III/IV (LS3, L92 & L99)

#7

7. POSENG Cathedral Manifold

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

Best for: Cable-drive cathedral-port LS builds.

Why it ranks #7: The listing targets cathedral-port LS engines and specifies a 92mm throttle body with cable drive only, giving buyers a clearly defined control-style fit.

Explicit cable-drive-only compatibility is the defining detail of this POSENG manifold, which lists a 92mm throttle body and cathedral-port LS applications. The stated engine coverage includes 4.8L, 5.3L, 5.7L, and 6.0L examples, with several Corvette and other vehicle applications named.

The 92mm throttle-body sizing gives cable-drive builders a clear interface to match, while the stated cathedral-port shape narrows the cylinder-head fitment. POSENG notes that additional modifications may be required, and its injector information specifies LS1/LS6 injectors; other injectors may need bracket drilling or spacers. Those details matter when planning a build around existing fuel-system parts, rather than treating engine displacement alone as sufficient fitment confirmation.

Skip it if you run drive-by-wire; Endxedo's 102mm manifold lists a throttle body, TPS, and IAC, though fitment still needs checking.

This POSENG option suits cable-drive builders with cathedral-port LS engines and compatible LS1/LS6 injectors. It is not for drive-by-wire systems, and other injector setups may call for bracket changes or spacers.

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

#8

8. Endxedo 102mm LS Manifold

• Package Dimensions: 23.5 x 15.25 x 11 in
• Weight: 19.91 lb

Best for: Complete 102mm cathedral-port package.

Why it ranks #8: This 102mm cathedral-port package lists fuel rails, throttle body, TPS, and IAC, but the supplied details do not specify a low-profile height.

A 102mm intake manifold listing that names fuel rails, throttle body, TPS, and IAC gives this Endxedo package a broad set of included components. Its stated cathedral-port compatibility covers several LS engine families, including 4.8L, 5.3L, 6.0L, and 6.2L examples.

The listed LS1, LS2, and LS6 cathedral-port fitment establishes the head configuration to check, while the additional engine codes span multiple displacement families. A 102mm opening provides the throttle-body size reference, and the title names fuel rails, throttle body, TPS, and IAC as part of the package. Those components can simplify parts planning, but the broad engine list still calls for matching the specific cylinder-head port shape and vehicle application.

Skip it if you have rectangle-port LS3 heads; Htostar Racing's 102mm LS3 manifold lists rectangle-port compatibility.

Endxedo suits buyers wanting a 102mm cathedral-port package with fuel rails, throttle body, TPS, and IAC listed. Match your head ports and engine application carefully, since its stated fitment is not universal across LS families.

Listed on Amazon as: 102mm Intake Manifold with Fuel Rails and Throttle Body TPS IAC Compatible with Chevrolet Chevy Cadillac Pontiac Firebird for LS1 LS2 LS6 5.3L 6.0L 5.7L Black

#9

9. YESHMA 92mm LS Manifold

• Package Dimensions: 20.7 x 15.4 x 10.7 in
• Weight: 17.26 lb

Best for: 92mm cathedral-port LS swaps.

Why it ranks #9: Its 92mm opening and broad cathedral-port engine list provide useful fitment detail, but the supplied listing does not state a low-profile height.

A 92mm inlet matched to a broad list of cathedral-port LS engines makes the YESHMA manifold relevant to builders working across 4.8L, 5.3L, 5.7L, and 6.0L applications. Its vehicle list also names Corvette, Firebird, CTS V-series, TrailBlazer SS, and other platforms.

The listed engine range spans LR4, L33, L59, LM4, LM7, LS1, LS6, LQ4, LQ9, and LS2, giving buyers concrete engine codes to compare with their build. The 92mm opening supplies a clear throttle-body sizing reference, while the cathedral-port description narrows head compatibility. Named vehicle applications add another fitment cross-check, but the supplied information specifically points to cable-operated throttle-body availability rather than an electronic option.

Skip it if you require an electronic throttle-body option; Holley's LS3 Ultra Low-Ram uses a different rectangle-port application.

Choose this YESHMA manifold for a 92mm cathedral-port build matching one of its listed LS engine codes or vehicle applications. Its cable-operated throttle-body information makes throttle-control requirements an important boundary to check.

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

#10 · Rectangle-Port Ram

10. Holley LS3 Ultra Low-Ram

Best for: Custom rectangle-port tunnel-ram builds.

Why it ranks #10: This is explicitly an ultra-low-ram LS3 manifold with a 105mm flange, but its tunnel-ram design and rectangle-port application make it less directly comparable.

A front-entry plenum flange gives Holley's LS3 Ultra Low-Ram a useful starting point for custom throttle-body adapters or inlet ducts. This aluminum tunnel-ram manifold has a 105mm throttle-body flange and rectangle-port LS3 fitment, setting it apart from cathedral-port options.

The front-entry flange is intended to support custom adapter or duct fabrication, which helps builders plan a nonstandard inlet route around their installation. Its 105mm throttle-body flange provides a defined interface, while the included mounting hardware supports assembly planning. Holley also lists high-volume fuel rails for eight- and sixteen-injector configurations and 3/4-16 O-ring ports, giving fuel-system planners concrete connection and configuration information to assess.

Skip it if you need a cathedral-port LS1 manifold; YIUIY's 92mm LS1/LS2/LS6 option lists cathedral-port compatibility.

Holley's manifold suits LS3 rectangle-port projects requiring an ultra-low-ram layout and front-entry inlet planning. Its custom flange approach is best for builders prepared to fabricate or source a suitable adapter or duct.

Listed on Amazon as: Holley Intake Manifold, LS3 Ultra Low-Ram, 105 mm Throttle Body Flange, Tunnel Ram, Front Entry, Single Injector, Rectangle Port, Aluminum, Natural, LS3, GM LS-Series, Kit