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Fast LS3 LSXR High HP Runner 102mm Intake Manifold

$1,139.95 $1,117.95

Brand Fast
SKU: 146103B

Now available for LS3, L76, L92 and L99 rectangle port applications is a High Horsepower version of the LSXR™ Intake Manifold. With shorter and straighter runners than the original LSXR™, the High HP intake can make up to 20+ more horsepower than the original. Runner sets can also be purchased separately. 

FAST® engineers teamed up with airflow specialists at RHS® to develop polymer intake manifolds for GM LS based engines. Testing on a near stock LS7 engine with a Big Mouth 102mm Throttle Body™ produced gains of 16+ horsepower, and 26+ rear wheel horsepower on a 500c.i. engine. The LSXR™ 102mm Intake Manifold features a revolutionary modular design that allows fast and easy disassembly and features the ability to remove individual runners for porting.

Constructed from the same advanced polymer material as the original FAST® LSX™ 92mm Intake Manifold, the LSXR™ offers a host of benefits over aluminum aftermarket intakes, including lighter weight, increased 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™. Other features include integrated nitrous bungs and perfect bolt-on fitment that allows the use of factory accessories without modification or clearance concerns.


  • '08-'13 Corvette
  • '06-'13 Corvette Z06
  • '10-'14 Camaro w/ 6.2L
  • '14 Chevrolet SS
  • '09 Pontiac G8 GXP
  • '08-'09 Pontiac G8 GT
  • '95 & Older w/ Retro-Fit GM E-Rod 6.2L


  • FAST® Big Mouth Throttle Body (Drive-by-Cable)
  • OEM/Stock 4-Bolt* Throttle Body (Drive-by-Wire) FUEL RAIL OPTIONS
  • FAST™ Anodized Billet Fuel Rail Kit
  • OEM/Stock Fuel Rails w/ FAST™ Adapter Kit

*Can also be used with OEM 3-bolt throttle bodies (in applications where rectangle port heads have been retro-fitted) with FAST™ Adapter Plate.

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