The GTX frame is designed to use General Motors, O.E.M. motor mounts designed for 2006 through 2010 Chevrolet Cobalt and HHR cars. With the exception of a spacer needed for the anti-vibration mount at the transmission, all mounts are available from GM dealers, aftermarket suppliers, or online. The spacer is produced by Berrien Buggy and is included with the frame. Please note that as we produced the production version of the frame, we sourced all necessary parts from our local Advanced Auto Parts or GM dealer. Engine & transmissions in other models of GM cars may also be used by installing the 2006 through 2010 Cobalt and HHR mounts.