04 GTP Best mods from headers, cross over, exhaust & nose pulley
55

Asked by Corbett Nov 12, 2010 at 11:39 PM about the 2004 Pontiac Grand Prix GTP

Question type: Car Customization

What are the best mods to get the most out of it?

1 Answer
245

Roland answered 13 years ago

Smaller S/C pulley, reprogrammed PCM, headers, roller rockers or cam, larger exhaust, CAI.

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