FASS Adjustable Fuel Pressure Regulator Cummins 1985 GMC P3500 Base

1985 GMC P3500 Base

Exhaust leaks can rob your engine of horsepower

even the cast 62mm option is a major upgrade from the factory VGT

Pre-installed large oil level sight glass with calibration plug set to the factory fluid level to eliminate overfilling

**We Highly Recommend adding these products for best results:**

FASS Adjustable Fuel Pressure Regulator Cummins 1985 GMC P3500 BaseFASS Fuel Systems Adjustable Fuel Pressure Regulator (FPR1001) Part No: FPR1001 Supersedes Part No: FPR 1001 The FASS Fuel Systems Adjustable Fuel Pressure Regulator is intended for aftermarket performance applications requiring higher fuel pressures than a typical daily driver. These applications can vary from drag race vehicles, competition pulling trucks, or high performance marine applications. For your convenience we have pre drilled and tapped a