2006 GMC LBZ Duramax. Seams tuning is popular but original un tuned is also popular?
I purchased my first one ,it had a straight through 5” exhaust.no tune b Sold that one and now have an original exhaust one. A lot quieter that’s for sure. I think I can feel the difference in power but man was that open exhaust one loud.
Thinking about tuning , don’t tow anything big ,looking more for fuel economy if it’s possible? Is it worth it?
Duramax Tuning
Threaded Mode
