This crossmember allows the installation of the popular A727 3-speed, NAG1 5-Speed, 8HP70/8HP90 8-speed automatic transmissions, or Tremec TKX (GM style) manual transmission when used with the corresponding adapter plate (sold separately). No cutting or drilling is necessary; just bolt it in the original location using the supplied hardware. The modular design allows the use of several different transmission options without the need to buy or fabricate a different crossmember - simply change to a different adapter plate and the driveline and u-joint alignment have been preset to the corresponding transmission. BHS567 Crossmember is designed to be compatible with GM transmission mount, a popular, inexpensive, compact design that allows for better ground clearance than the original crossmember. See Hooker part numbers 71223029HKR or 71223030HKR - sold separately. Solid 3/16" Steel construction and black coated finish provides long lasting performance and good looks.