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Discussion Starter · #1 ·
hey guys. i have the 11226 magnaflow muffler installed on my 4.8 When i floor it and let off it pops really loud. is this normal? Its a 2.5 si/so
Also got an intake last night..Whooo what a difference. got it from pepboys for $120
 

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an exhaust leak will cause that...u may not hear it but that can cause popping under decel...check all the welds just to be sure...
 

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my truck used to do that with my Hooker Aerochamber, but i assumed it was because i had no catalytic converters. :shrug:
 
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