This Edelbrock Fuel Pressure Regulator kit #8193 allows for the adjustment of fuel pressure from 4-1/2 to 9 psi. Match with Edelbrock racing fuel pumps. Kits include fittings, 4500 series mounting plate, fuel line and regulator. Fuel line from fuel pump to regulator is not included; use #8122 or #8127 below for fuel pumps with 1/2" NPT outlets.