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94cobra69ss396 · 05-21-2009, 10:08 PM

My buddy had a maggie on his 04 GTO and he made 515rwhp with (I think) only 8psi of boost. I'm not sure what all he did but I think he had different heads and cam. He has since installed twin turbos and put down a little over 550rwhp. The guy he bought the twins off of had an 05 GTO with the 6.0 and he made 620rwhp. He wishes he had kept the maggie.

I can call him if you want and get him to throw in his two cents. He knows a lot about this not only from building his own car but he is also an ASE certified Master Tech and worked at a Chevrolet dealer with my brother.

05-21-2009, 10:08 PM	#3
94cobra69ss396 Fast & Filthy Join Date: Jun 2008 Posts: 3,840 Tweet	My buddy had a maggie on his 04 GTO and he made 515rwhp with (I think) only 8psi of boost. I'm not sure what all he did but I think he had different heads and cam. He has since installed twin turbos and put down a little over 550rwhp. The guy he bought the twins off of had an 05 GTO with the 6.0 and he made 620rwhp. He wishes he had kept the maggie. I can call him if you want and get him to throw in his two cents. He knows a lot about this not only from building his own car but he is also an ASE certified Master Tech and worked at a Chevrolet dealer with my brother.