L67 m90 supercharger porting one o one ( part 1-3)
This is one way you can port a m90 Supercharger outlet.
Monster Cammed GXP
Fresh LS4 cammed build. Motor done by Chris Hinson. This is Josh Stuer's custom grand prix GXP & 1st place winner at the 2013 Annual W-Body Meet.
some kills in the GTP
A modified Grand Prix GTP beating on some cars
2000 Grand Prix GT 3800 Series 2 Head Gasket Problem.
Ok update: The problem was a cracked lower intake manifold. Surprisingly the upper intake was fine. The EGR passage wasnt in bad shape at all. It was still sealed. But the lower intake was sucking oil and water in the wrong places.