Ahk cool, would be a Part of the Ford Motorsports/Ford Racing range
Probably these http://www.fordracin...rtKeyField=1272 done by these guys http://www.chapmanracingheads.com/products/prodDetails.asp?pID=29
they were developed by Roush/Yates for Ford Motorsport, they are they small port/valve version of the D3 NASCAR heads (which the FG's also use)
Edit - Dammit wrong account
Cheers
Zebra