PaceSetter 82-1126 Off Road Cross-Over Pipe Fits only #70-3220, 72C3220, 70-3221 and 72C3221 Quik Trip Long Tube Headers for 96-04 Mustang with 3.8L V6 2-1/2" diameter, 16-gauge for durability No special tools required for installation All required fasteners included For racing only