D8VE heads
Just addressing that and a mild bowl blend on the intake side will afford an 8 to 10% increase in fuel economy and some 25 to 40 RWHP even in a stock application.
http://www.reincarnation-automotive.com/D3-bowl-ascast.jpg
http://www.reincarnation-automotive.com/ExhaustExitViewD3220.jpg
http://www.reincarnation-automotive....tionsD3220.jpg
Above are links, to my site, of before and after pics of a D3 style ehxaust port.
Hope this helps some...
SMJ/RHP
http://reincarnation-automotive.com
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