These progressive 4-barrel throttle bodies bolt directly to standard square-bore or 4500 Series carb mount flanges for competition electronic fuel injection systems based on our Victor Series manifolds. Fully machined by Edelbrock and include a GM style throttle position sensor (TPS). They are available with and without an idle air control (IAC) motor. Will fit standard style air cleaners (5-1/8 or 4500 series). Available in standard finish or black powder coated.