The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

OKGMC4 · 10-12-2012, 06:12 PM

I sized mine using this chart...

http://www.dynomax.com/assets/2008ca...enginesize.pdf

According to that, dual 2.5 exhaust is good to at least 350 hp with turbo mufflers. Most 5.3 engines are somewhere around 300hp.

10-12-2012, 06:12 PM	#8
OKGMC4 Registered User Join Date: Oct 2009 Location: Broken Arrow, OK Posts: 1,252	Re: proper exhaust for a 5.3 I sized mine using this chart... http://www.dynomax.com/assets/2008ca...enginesize.pdf According to that, dual 2.5 exhaust is good to at least 350 hp with turbo mufflers. Most 5.3 engines are somewhere around 300hp. __________________ 56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167