This direct replacement features a larger than stock diameter of 2-1/4 inches for increased performance. This is the H pipe only and is for any 1967-68 Mercury Cougar or Ford Mustang with stock cast iron exhaust manifolds that includes the spacer valve on the passenger side. These units are manufactured right here in the good old USA from 2-1/4 inch aluminized pipes and made from original 1967 and 1968 Cougars and Mustangs with either the 390 or 427 engine. We also sell this H pipe in a 2 inch diameter and have OEM style dual exhaust systems that include the H pipe, mufflers, and tail pipes.
*NOTE* This H pipe has a larger diameter than the original Ford unit and will increase performance. The larger diameter may also increase the engine sound you hear inside your car.
Please allow 2 - 3 weeks for delivery.