Custom 3.9L Exhaust - Pontiac G6 Forum
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post #1 of 1 (permalink) Old 05-23-2016, 11:19 AM Thread Starter
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Custom 3.9L Exhaust

So Im planning on a new exhaust for my 07 GT Sport 3.9L 6-spd. My idea is to run new pipe from the cats down to a free flowing 3-inch collector and 3 inch all the way back to the axle. Then I want it to Y off to 2.5 inch into a Moroso Spiral flow muffler on each side and dual tips. I know this will require modification of the rear valance panel.

My question they make a header for the 3.9L?

2007 G6 GT Sport Package with 6-speed Manual

2001 Chevy Blazer Xtreme *For Sale $3700*
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