Gain 64HP With The COMP Cams® GEN III Stage IV Performance Package!

Stage IV of the COMP Performance Group™ GEN III Performance Package brings the horsepower gain up to 64HP over factory LS1 specs*. Stage IV consists of a swap to one of the FAST™ LSX™ Intake Manifolds. LSX™ intakes deliver vast improvements in airflow and efficiency over even the highest-performance factory intakes, and they do it without sacrificing off-idle torque or throttle response. The LSX™ 78mm is the hot ticket for powerful bottom-end torque, and the super-efficient LSX™ 90mm kicks out serious high-rpm horsepower for max-effort street/strip action. Choose one based on how you intend to use your vehicle.

LSX™ 78mm Intake Manifold for GEN III, LS1, LS2, LS6 – Race Car Performance, Street Car Manners!
The FAST™ LSX™ 78mm intake manifold delivers maximum torque and throttle response for GEN III LS1, LS2, and LS6 street performance applications. With its high-velocity throttle body bore, the LSX™ 78mm intake performs best in the off-idle and midrange areas. Although the LSX™ 78mm reaches its highest potential when used with the matching LSX™ Throttle Body, it will also deliver great performance with a stock GM throttle body. Corvette owners running a drive-by-wire system will want to run their factory 78mm throttle body in order to retain the drive-by-wire function. See below for a table of required and optional components for the LSX™ 78mm intake system.

Experience Huge Horsepower Gains With The LSX™ 90mm – The Ultimate GEN III Intake!
The FAST™ LSX™ 90mm intake manifold delivers big horsepower without sacrificing off-idle acceleration for GEN III street/strip applications. With its high-flow throttle body bore, the LSX™ 90mm intake offers superb performance in the midrange and upper-RPM areas. The LSX™ 90mm intake must be used with the matching LSX™ 90mm Throttle Body. Corvette owners running a drive-by-wire system will need to run a GM LS2 throttle body in order to retain the drive-by-wire function. See below for a table of required and optional components for the LSX™ 90mm Intake System.
FAST™ LSX™ INTAKE MANIFOLD
For all GM GEN III, LS1, LS2, LS6: 1997-Present
LSX Intake & Accessories 78mm Part # 90mm Part # Required / Optional What It Does For You
LSX™ intake manifold, complete 54001 54003 Required Replaces factory intake manifold for a big increase in torque and HP
LSX™ throttle body w/TPS (cable drive only) -includes mounting hardware* 54017 54019 Recommended Precision throttle body for your LSX™ 78mm intake –delivers max airflow and hp
LSX™ Throttle Body Seal 54010 54011 Required Required to install LSX™ throttle body to LSX™ intake manifold
LSX™ Intake Seal Kit 54009-8 54009-8 Required Required to seal intake manifold runners to engine
LSX™ 36 lb Burst Panel Kit 54002 54002 Optional Safeguards intake against excessive boost pressure and nitrous backfire damage
LSX™ High Flow Billet Fuel Rail Kit w/fittings 54023 54023 Optional Delivers maximum fuel flow with your LSX™ Intake
LSX™ 0-100 psi EFI Fuel Gauge Kit 54027 54027 Optional Allows instant monitoring of fuel pressure for tuning and diagnostic purposes
LSX™ 98-02’ F-Body Fuel Line Conversion Kit 54028-KIT 54028-KIT Optional Required to connect LSX™ fuel rails to OEM fuel line connectors on 98-02’ F-body vehicles (Camaro, Firebird, etc.)
LSX™ to LS2 Fuel Rail Adaptor Kit –used with factory LS2 fuel rails 54026 54026 Optional Required to run LS2 OEM fuel rails with LSX™ intake manifold