Have a friend who has some GTSR heads that he may want to unload. I have a 96 GTS with smooth tubes, Mopar performance computer, K&N Filters, Oreca wires, belanger headers, no cats and borla exhaust.

Anything special about these heads and what should I look for as far as flow numbers, HP gains etc...any information would be appreciated.

How can I tell that they are GTSR heads?