Hello all, so I am wondering if this is just something in my head. I have a 2011 Avalanche and I put a Flowmaster Super 50 muffler on it about 30000km ago, it has great sound as the truck almost sounds like it has a 6L when it is only a 5.3L so I am happy about this. My issue is I find the truck just seems a bit off like the power is just not there, this may have been an after effect of the muffler as the back pressure will have been reduced. Has anyone else found this to be an issue and what could be done to correct the issue?
Regards
Sean
Regards
Sean