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FAST LSX/LSXR/LSXRT Fuel Rails feature a larger internal diameter that dampens the pulses and provides increased fuel volume, ensuring that your in...

FAST LSX/LSXR/LSXRT Fuel Rails feature a larger internal diameter that dampens the pulses and provides increased fuel volume, ensuring that your in...

FAST offers several main harness options to aC-Commodate most customers' needs. The XFI Main Harness is responsible for connecting your XFI ECU to ...

FAST XFI Fuel Injector Harnesses connect the XFI ECU to the fuel injectors. These harnesses are designed to aC-Commodate most common V8 engines fro...

FAST has developed the industry’s first polymer tunnel ram-style intake manifold, ideal for generating maximum power in boosted and naturally aspir...

Replacement parts available. See 54039BUS for the upper shell. See 54039BLS for lower shell. Billet fuel rails available under 54023. Compatible th...

Constructed from the same advanced polymer material as the original FAST LSX 92mm Intake Manifold, but now in the popular black color, the LSXR off...

Constructed from the same advanced polymer material as the original FAST LSX 92mm Intake Manifold, but now in the popular black color, the LSXR off...

Constructed from the same advanced polymer material as the original FAST LSX 92mm Intake Manifold, but now in the popular black color, the LSXR off...

The FAST LSX 102mm Intake Manifold for GM 4.8, 5.3 and 6.0 truck engines provides bolt-on performance gains without any loss in bottom-end drivabil...

This gasket provides a seal between the throttle body and our LSXR/LSXRT 102mm Intake Manifolds.

This fuel injector spacer kit for LS3/L99 and L76 engines is designed to allow the use of OE fuel rails with our 146102B, 146103B and 146104B 102mm...

This intake manifold gasket ensures a proper seal between the upper and lower shells on our 102mm LSXR and LSXRT intake manifolds.

These gaskets are designed to provide a seal between the LSXR 102mm intake manifold and LS1, LS6 and LS7 cylinder heads.

These gaskets are designed to provide a seal between the LSX 92mm intake manifold and LS1, LS2 and LS6 cylinder heads.

This seal kit for LSXR and LSXRT manifolds includes 8 intake runner to cylinder head seals as well as new injector o-rings, lower shell rubber bump...

Air Temperature Sensor used in EZ Fuel and EZ Fuel + Ignition Throttle Bodies

Made of stainless steel and convenient for quick oxygen sensor tests, this easy-to-use FAST kit slides into the tail pipe to prevent welding. The a...

All the benefits of the current Big Mouth 102mm Throttle Body(TM) are now available for drive-by-wire applications, thanks to the new FAST(TM) 102m...

The Fast Big Mouth 102mm throttle body provides increased airflow through a smoother offset blade pivot. In addition we increased blade thickness t...