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Re: GheyrodX - bigger, fatter, gheyer!
Retuned...
MAP short-runner exhaust manifold ---> MAP ported/SPC coated stock exhaust manifold:

-3whp/+10wtq
413whp/384wtq
I'll get an before/after overlay soon.
Link to full size sheet: http://www.dsmstyle.com/photopost/data/641/413-384.jpg
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