A few things about the CF valve covers. at one time, Sean Hyland was selling those or making those. not even sure if he's still around. Also, they are great for racing application but tend to have sealing issues after awhile. The ones pictured will physically fit the GT engine however have oil fill holes on the opposite side which is incorrect for the GT since there are no oil provisions in the GT valve covers. also no place for the engine build plate. FYI