Got yourself a rectangle port LS3-style motor? Looking for a hot intake manifold to boost your power? FAST has just released the right thing for you. Their new LSXr 102mm intake manifold has proven itself to pick up 14hp and 11 ft/lbs at the flywheel over the stocker. The intake is a three-piece design and that means easier access for easy disassembly and porting for max effort power. 

Here’s the full release from FAST:

FAST™ LSXR™102mm Intake Manifold for LS3 Engines

Innovator of performance EFI technology extends its line of revolutionary LSXR™ Intake Manifolds to maximize the performance of GM LS3 engines

The engineers at FAST™ teamed up with the airflow specialists at RHS™ to develop a three piece, polymer intake manifold for rectangular port GM LS3-type engines. Testing on a stock LS3 engine with a Big Mouth 102mm Throttle Body™ produced gains of up to 14 horsepower and 11 ft./lbs. of torque at the flywheel over the stock intake.

Following the path chartered by the original FAST™ LSX™ Gen III Manifold, the new LSXR 102mm Intake Manifold features a three-piece modular design that allows easy disassembly and porting. Extensive testing led to a runner design that is longer and less restrictive, yielding both torque and power gains over the stock intake. New to this design is the ability to remove individual runners from the manifold for modification.

The LSXR™ is constructed from a proprietary advanced polymer material which offers a host of benefits over aluminum aftermarket intakes, including lighter weight, strength and improved heat dissipating characteristics. While the LSXR™ features a 102mm air inlet that is perfectly suited to the FAST™ Big Mouth 102mm Throttle Body™, it can also be used with stock or aftermarket 90mm or 92mm throttle bodies. Other features include integrated nitrous bungs and perfect bolt on fitment that allows the use of factory accessories without modification or clearance concerns.