Originally Posted by 82corvette
I went the Flowmaster route on my 04 HD2500. Same gas mileage, didn't feel any more power but man was it noisy. I saved that Flowmaster to remind me not to believe advertising again!
Those mufflers are directional specific.. did you put it on facing the right way? They will add sound but it should not be to bad... I added a MBRP turbo back to my truck.. got better mileage with it as long as I can keep my foot out of it..
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12