1-3/4" x 3" Stainless Steel Long Tube Headers 1979-1995 Ford Mustang with 5.0L 4V Coyote Modular Engine. For use with 10R80, 6R80, and MT-82 transmissions w/ OEM style bellhousing. Includes Gaskets and Headers bolts needed for installation. Designed for use with Maximum Motorsports K-Member PN:MMKM-2.1 and STANDARD 4.6L motor mounts - Maximum Motorsports PN:6-504-BL. Must use 1997-2000 Mustang 4.6L Starter - Ford P# SA848RM or Equivilant. *Requires REMOVAL of OEM TRANSMISSION CROSSMEMBER MOUNTS. Recommended for use with STIFFLERS transmission crossmembers. Cannot be used with 2015 & Newer Coyote engines with Charge Motion Control Valves. Cannot be used with OEM style rubber rag joint STEERING SHAFT. Replaces PN's: 10502200, 10502201. FOR MANUAL TRANSMISSION USE PART# 10512202