I'm wondering if theres a Wrap, like maybe heat wrap I can put around my mufflers that would decrease the interior noise. I'm taking out my cats (All 4 of them) and running 1 chamber flowmasters and I kinda need it

Thanks!

 

well, I guess you could use header wrap, or some other form of heat insulating material, but Im pretty sure interior resonance comes from whats coming out of the muffler, noiise!
If you want to quiet it down a little, run a straight through preforated ( not louvered) glasspack before the muffler, it will tone it down some and not take away power,

but if you wanna keep the sound, dont count on reducind interior resonance, Im saying this because of my past car expierences, I never keep a stock muffler on for long!
hope this helps