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LSXrt 102mm Intake Manifold for GM LS 4.8/5.3/6.0L Truck with Cathedral Port Heads

3.5 3.5 out of 5 stars 18 ratings

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Purchase options and add-ons

  • Designed for late model GM 4.8/5.3/6.0L port truck engines and all LS1, -2, -6 based engine race applications with appropriate cowl clearance.
  • Multi-layer modular design with removable runners for easy disassembly and porting.
  • 102mm inlet works with 90, 92, or 102mm throttle bodies for high flow and minimal restriction.
  • Advanced polymer material is strong, lightweight and cools intake charge for enhanced power.
  • Big gains in rear-wheel hp yet retains factory fitments and under-hood clearance requirements.
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$1,337.13
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Ships from and sold by IPC-STORE✅.
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$276.99
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Ships from and sold by HINSON Motorsports Inc.
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LSXrt 102mm Intake Manifold for GM LS 4.8/5.3/6.0L Truck with Cathedral Port Heads
LSXrt 102mm Intake Manifold for GM LS 4.8/5.3/6.0L Truck with Cathedral Port Heads
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Price$1,337.13$465.95$158.00$489.95$215.99$1,163.95
Delivery
Get it Apr 2 - 3
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Sold By
IPC-STORE✅
Dynosty
Woosphy
Dynosty
PowerGo Motorsport
Fast Track Auto

From the manufacturer

Big Gains for Big Vehicles

25 HP bolt-on gains for '99+ 4.8, 5.3 and 6.0L GM Trucks.

Removable Runners

The Fast LSXrt 102mm Intake Manifold follows the path chartered by the original Fast LSX Gen III Intake by featuring a modular design that allows for easy porting and disassembly.

This new runner design yields an incredible 25 peak horsepower gain over the stock intake, on a stock 6.0L engine with a Big Mouth 102mm Throttle Body.

Big Mouth Compatible

Features a 102mm air inlet that was designed for the FAST Big Mouth 102mm Throttle Body.

Can also be used with OEM electronic 78/90mm or aftermarket 90/92mm throttle bodies (three-bolt electronic throttle bodies require an adapter).

146602B
Customer Reviews
3.5 out of 5 stars
18
Cathedral Port (LS1, LS2, LS6)
Nitrous Bungs
Factory Accessories
OEM Throttle Body Compatible Yes, may require 146029-KIT for '02-'07 Trucks.
Fuel Rail Kits Available
Replacement Lower Shell 146601
Replacement Upper Shell 146100B

Product Description

Designed specifically for GM 4.8/5.3/6.0L LS cathedral port truck engines and cathedral port LS1, -2, -6 race applications where hood clearance is not a concern. The FAST LSXrt 102mm Intake Manifold follows the path chartered by the original FAST LSX Gen III Intake by featuring a modular design that allows for easy porting and disassembly and a runner design that yields an incredible 25 peak horsepower gain over the stock intake, on a stock 6.0L engine with a Big Mouth 102mm Throttle Body. And similar to the LSXr 102mm Intake Manifold for cars, the LSXrt features the ability to remove individual runners for modification.

The LSXrt is constructed from a proprietary precision injection molded polymer which offers many benefits, including lighter weight, greater strength and lower heat soak propensity. While it features a 102mm air inlet that was designed for the FAST Big Mouth 102mm Throttle Body, it can also be used with stock 90mm or aftermarket 92mm throttle bodies (78mm three-bolt throttle bodies require an adapter). Other features include integrated nitrous bungs and precise bolt-on fit that permits the use of factory accessories and OEM fuel/emission connections without adjustments or clearance issues. Some GM truck models may require the FAST 92mm or 102mm throttle body.

Product information

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Warranty & Support

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LSXrt 102mm Intake Manifold for GM LS 4.8/5.3/6.0L Truck with Cathedral Port Heads


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What's in the box

  • LSXrt 102mm Cathedral Port Intake Manifold for 4.8, 5.3 and 6.0L LS Trucks
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    Customer reviews

    3.5 out of 5 stars
    3.5 out of 5
    18 global ratings
    STOCK 99-06 truck throttle bracket works
    5 Stars
    STOCK 99-06 truck throttle bracket works
    Nice intake as expected I did look for what bracket would fit before I bought it. Planned on building one but the stock gen 3 truck one fits and has cruise.Overall nice piece. Expensive but everything is.
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    Top reviews from the United States

    Reviewed in the United States on September 21, 2020
    8 people found this helpful
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    Reviewed in the United States on February 5, 2020
    12 people found this helpful
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    Reviewed in the United States on August 7, 2021
    5 people found this helpful
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    Reviewed in the United States on December 17, 2021
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    B&R
    5.0 out of 5 stars STOCK 99-06 truck throttle bracket works
    Reviewed in the United States on December 17, 2021
    Nice intake as expected I did look for what bracket would fit before I bought it. Planned on building one but the stock gen 3 truck one fits and has cruise.

    Overall nice piece. Expensive but everything is.
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    Customer image
    5 people found this helpful
    Report
    Reviewed in the United States on April 27, 2018
    12 people found this helpful
    Report