That's a full 3.5 inch?^^^. Maybe it's me but the tail pipe doesn't look that big.

Nice truck though, problem is our sound clips do not give our trucks justice. My I phone videos sound like crap compared to standing outside my truck.

FYI. Mine has a little drone when it's in 4cly mode. Cruising at 65 in v8 it's quiet.

 

Yea, it's all made from duramax pipe, I tucked and slash cut the tail pipe so it looked to be stock lol I must have got the job done!

 

Has anyone tried a big Borla muffler yet: Borla XR-1 Racing Mufflers 400069 - SummitRacing.com

I'm thinking this one or just the biggest Magnaflow I can find. The Borla is $$$ though.

 

I have a brand new hooker 4" that's straight through design. I would sell it if interested!

 

Just saw a video on YouTube, Livernois' turbo raptor with Corsa exhaust that whistles through its tailpipe.

Anyone use Corsa's 4" diesel muffler on gas turbos?

I got 3.5" after 3" dp, what would I lose if I went 3.5" to 4" muffler back down to 3.5" tailpipe?