Hey guys, wanting to know how to tell the difference between standard gt40p heads and series 3 220kw head, did yella terra modify the series 3 head? if so how?? And wat size throttle body did series 3 xr8 have?
Any help would be great..

220kw GT40P heads will have "port matched" inlet ports. Pop the inlet manifold off and you should see some obvious machining on the port walls.

220kw AUIII had 70mm TB with Tickford logo on the side.