Australia-wide shipping on performance, 4x4 and vehicle-specific upgrades.

FAST LSXRT Manifold 102MM LS Truck Intake Manifold Kit

SKU: FST146602B-KIT

Intake Manifolds, Fuel Injected

FST Intake Manifolds

FAST LSXRT Manifold 102MM LS Truck Intake Manifold Kit

SKU: FST146602B-KIT

Intake Manifolds, Fuel Injected

FST Intake Manifolds

A$3,554.43
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
View cart
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

Designed specifically for GM 4.8/5.3/6.0L cathedral port truck engines and cathedral port LS1, -2, -6 race applications where hood clearance is not a concern, the FAST LSXRT102mm 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 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.

Part Type

Engine Intake Manifold Kit

Data: v4.2 - Upd: 2026-09-28 23:58:05

Features

  • The LSXrt Intake + Big Mouth 102mm Throttle Body Kit increases horsepower and throttle response thanks to improved manifold flow and a 102mm throttle body boreBillet throttle blade decreases deflection, polymer manifold reduces heatsoak.

Specifications

Product Attributes - Brand
FAST
Product Attributes - Manufacturer's Part Number
146602B-KIT
Product Attributes - Part Type
Intake Manifolds, Fuel Injected
Product Attributes - Product Line
FAST LSXRT Intake Manifolds
Product Attributes - UPC
00036584399216
Product Attributes - Cylinder Head Configuration
Cathedral Port LS1/LS2/LS6
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Basic Operating RPM Range
1,800-6,000
Product Attributes - Intake Section Included
Complete
Product Attributes - Throttle Body Bore Size
102mm
Product Attributes - Engine Block Deck Height
Standard deck
Product Attributes - Injectors Included
No
Product Attributes - Multi-Port Fuel Rails Included
No
Product Attributes - EGR
No
Product Attributes - Aftermarket Fuel Rail Required
Yes
Product Attributes - Throttle Body Included
Yes
Product Attributes - Supplemental Bosses Cast-In
Yes
Product Attributes - Supplemental Bosses Machined
No
Product Attributes - Supplemental Boss Quantity
Eight
Product Attributes - Runners Included
Yes
Product Attributes - Runners Removable
Yes
Product Attributes - Plenum Material
Plastic
Product Attributes - Plenum Finish
Black
Product Attributes - Base Material
Plastic
Product Attributes - Base Color
Black
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Kit includes a Big Mouth 102mm throttle body. 78mm three-bolt throttle bodies require an adapter. May require a taller hood.

Reference Information

Brand Name/s Fast
StreetFX SKU fst146602B-KIT
SFX Item ID 4084999
Supplier Item Code 4084999
Manufacturer SKU 146602B-KIT
Manufacturer UPC 36584398981
Alternative References 102MM

Brochures

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2019
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364

Loading compatibility information...

Keep shopping

More from Fast