Fits 3471, 3479 & 3480 Exhaust Headers Includes Gaskets. Clamps & Hardware Same Competition-Proven Exhaust with Dual Quiet Muffers in your choice of 1 1/2" or 1 5/8" Tube size. Features a merged, spring-attached collector and includes gaskets, clamps & hardware. Eliminates heater boxes, Type 1 only.