Empire Industries Billet Throttle body for Raptor 700 (Fits all years). The 50mm throttle body fits the stock intake boot and stock airbox or FCI Intake. The 54mm & 58mm throttle body comes complete with an intake to fit the larger 54mm & 58mm throttle bodies. Great upgrade from stock 44 or 47mm bored throttle body. Substantial top end performance without sacrificing bottom end performance.