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Took my TD's X pipe off
and got me the GMMG. It sounds great but now I have an exhaust backfire when I'm decelerating or at idle during a stop. I know the backfire is due to the unspent gas in the exhaust burning off. But is the backfire occurring because the GMMG system is more restrictive?
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-Felipe
2001 WS6: SDPC LS7 Shortblock, L92 heads upgraded for .600 lift,
L76 intake, Nick Williams TB, Comp Cams 224/228 .581/.588 114+2LSA,
1 7/8 LT's, GMMG
waiting for some boost
2003 Silverado 1500HD
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