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Re: Dual exhaust warning
Quote:
Originally Posted by piecesparts
I installed a set of Kooks headers, 'Y' pipe and then a Magnaflow muffler with dual exhausts out to the rear on my 2011 GMC, with a 5.3 and a six speed auto. Yes the sound is different in the 4 cylinder mode and it does seem to drone a little. WIth my tune, we deleted the AFM adn now I run in 8 cylinder mode all of thetime. I just drove a 2000 mile round trip and averaged 20.5 MPG while running at the highway speeds along with traffic. I cannot complain.
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Frank, where did you get your tune? I'm trying to decide who to go with when I put my headers on.
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1999 GMC Suburban K2500 SLT, 454/4L80E
1991 Z/28, 6.0L/T56
1949 GMC 250, S10 Frame, 6.0L/4L80E
Instagram @aceshighspeedshop
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