Proven LSX Performance With A New Look!

FAST™ engineers teamed up with airflow specialists at RHS® to develop polymer intake manifolds for GM LS based engines.


The result:

  • A revolutionary new modular design that allows fast and easy disassembly and features the ability to remove individual runners for porting
  • Constructed from advanced polymer material offering a host of benefits over aluminum aftermarket intakes, including lighter weight, increased strength and improved heat dissipating characteristics.
  • Perfectly suited to the FAST™ Big Mouth Throttle Body™
  • Integrated nitrous bungs and a precise bolt-on fit that permits the use of factory accessories and OEM fuel/emission connections without adjustments or clearance issues


P/N 146102 (102 mm, fits Rectangle Port Cylinder Heads – LS3, L99 & L76)

P/N 146302 (102mm, fits Cathedral Port Cylinder Heads – LS1, LS2 & LS6)

P/N 146202 (102mm, Raised Rectangle Port Cylinder Heads, LS7)

P/N 54039B (92mm, black, fits Cathedral Port Cylinder Heads – LS1, LS6 & LS2)


P/N 146602 (102 mm, fits Cathedral Port LS Heads -4.8L, 5.3L, 6.0L)

Accessories Available Include:

  • Drive-By-Cable Throttle Body Options -Big Mouth Throttle body™
  • OEM Throttle Body Adaptor Plate
  • Fuel Rail Options
  • Billet Fuel Rail Kits
  • Adaptor Kit for Stock/OEM LS2 Fuel Rails
  • Fuel Injector Spacer Kit for OEM Rails
  • OEM Fuel Line Conversion Kits with or without Fuel Pressure Gauges

Click here, for further information on these LSX™ intake manifolds and their accessories.


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