New Accufab fuel pressure regulator for 89-93 Mustang with 5.0 engine. Accufab has developed this Ford Mustang Fuel Pressure Regulator 1986 -1993 to optimize your fuel pressure needs. The regulator is crafted from high quality billet aluminum and anodized black. Then, each is assembled using only top quality internal component parts. Also, each regulator is adjustable and boost sensitive. Accessories included: Each regulator comes completely assembled with no extra parts.