FAST LSXR 102mm LS7 Lower Shell

FAST LSXR 102mm LS7 Lower Shell

FAST engineers teamed up with airflow specialists at RHS to develop a polymer intake manifold designed specifically for rectangular port GM L92/LS3 engines. Testing on a stock LS3 engine equipped with a Big Mouth 102mm Throttle Body showed impressive gains of over 30 horsepower and 25 ft/lbs of torque at the flywheel compared to the stock intake. This LSXR 102mm Intake Manifold features a three-piece modular design that allows easy disassembly, porting, and customization to suit performance needs.

Key Features

• Three-Piece Modular Design: Allows for quick disassembly, cleaning, and porting customization.
• Improved Runner Design: Longer, less restrictive runners maximize airflow for increased power and torque.
• Advanced Polymer Construction: Lightweight, durable material improves heat dissipation and reduces weight compared to aluminum intakes.
• High Performance Gains: Proven dyno-tested improvements of 30+ HP and 25+ ft/lbs of torque on a stock LS3 engine.
• Throttle Body Compatibility: Features a 102mm inlet ideal for FAST Big Mouth 102mm Throttle Bodies but also compatible with 90mm or 92mm units.
• Integrated Nitrous Bungs: Designed with built-in nitrous ports for easy system integration.
• Perfect Fitment: Direct bolt-on installation with no modification required—retains factory accessories and clearances.
• Engine Compatibility: Designed for LS7 applications and compatible with rectangular port GM L92/LS3-style cylinder heads.

Click here to view the Installation Instructions (PDF)