ADJUSTABLE HIGHFLOW TPI FUEL PRESSURE REGULATOR & DIAPHRAGM FOR 1985-1992 TPI

Highflow Adjustable Fuel Pressure Regulator and Diaphragm for ALL 1985-1992 GM TPI 305/350. An adjustable regulator is a great way to tune the vehicles fuel trims to obtain optimum air / fuel ratios and achieve maximum horsepower with.