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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, they are assembled/calibrated by Magnetic Marelli USA and include a GM style throttle position sensor (TPS). ED3878, ED3879, and ED3888 include a Delphi/GM idle air control (IAC) motor. ED38783, include a Hitachi Linear IAC motor and must be used with our ECU systems on the Pro-Tuner EFI Application Chart. Standard style air cleaners (5-1/8" or 4500 series) will fit. Available in standard finish or black powder-coated finish for a great look with performance to match.