FAST 146102B-KIT LSXR 102mm LS3/L92 Intake Manifold and Big Mouth Throttle Body Kit

The FAST 146102B-KIT combines the LSXR 102mm intake manifold with the Big Mouth 102mm billet throttle body to deliver maximum performance gains for GM LS3, L92, L76, L99, LS9, and LSA rectangular port engines. This complete kit provides a proven combination that increases horsepower and torque while improving throttle response.

LSXR 102mm Intake Manifold Features:

• Advanced polymer construction offers lighter weight, increased strength, and superior heat dissipation compared to aluminum manifolds
• Three-piece modular design allows easy disassembly and individual runner removal for porting modifications
• Longer, less restrictive runner design optimized through extensive dyno testing
• 102mm air inlet perfectly matched to the included Big Mouth throttle body
• Compatible with stock or aftermarket 90mm and 92mm throttle bodies
• Integrated nitrous bungs for power-adder applications
• Perfect bolt-on fitment with factory accessories without modifications
• CARB E.O. D-279-10 compliant

Big Mouth 102mm Throttle Body Features:

• Billet aluminum construction for maximum durability
• Increased throttle blade thickness eliminates deflection in boosted applications
• Offset blade pivot design improves throttle response
• Beefed-up linkage with dual throttle spring mechanism ensures total control
• Optimized cross-sectional flow reduces turbulence at part throttle
• Includes TPS (Throttle Position Sensor) and IAC (Idle Air Control)
• Designed for cable-driven throttle applications

Performance Gains:

Testing on a stock LS3 engine produced gains of over 14 horsepower and 11 ft-lbs of torque at the flywheel compared to the stock intake manifold.

What's Included:

• FAST 146102B LSXR 102mm Intake Manifold
• FAST 54103 Big Mouth 102mm Throttle Body with TPS and IAC
• Hardware for manifold assembly

Application:

Fits GM LS3, LS9, L76, L92, L99, and LSA engines with rectangular ports. Compatible with Gen III and Gen IV LS platforms.

Note: Fuel rail spacers or adapter kits may be required depending on your fuel rail configuration. The FAST fuel rail kit or LS3 fuel rail spacer kit is available separately.