Found it
You've probably seen the ad here at TDR for it. But just in case ya didn't here's a website for sound deadening that seemed interesting.
Advanced Thermal Products
Today I added a Magnaflow short SS resonantor. A short test drive did not reveal much difference, I will have to get it out on the road and see if the exhaust brake is quieter.
Next is to sound deaden the cab. SNOKING
You've probably seen the ad here at TDR for it. But just in case ya didn't here's a website for sound deadening that seemed interesting.
Advanced Thermal Products