Just installed it last Friday....no cat,no muff.
MBRP 4" .........not much louder in the cab,a little drone at 1500 rpm.
You sure can tell how much air it pushes....even at idle,turbo is a bit louder,but the drone is the only thing i notice in the cab.
i was looking at the mbrp but didn't know what else i would need for a cat delete. will i have code problems with ou a cat? also wanted to ditch the egr but kind of waiting to see what the best way will be to do so on the Lbz.
seems like mixed emotions about the fingerstick working....
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!