Mark408

Hey all!
Finally got to swapping out the ol' flowmaster muffler on my 03 1500HD w/ 6.0l LQ4 for something more straight through.
I originally wanted a Corsa DB diesel muffler but that was a bit pricey just for the muffler itself.
So I went with the Magnaflow 14419 muffler ($73), a TotalFlow stainless Y-pipe ($13), and a 4" exhaust tip ($35).
Had it installed for a $160 at a local shop that I have been going to for many years. The truck still has the stock exhaust manifolds and cats. Only thing done to the truck is an Airaid MIT tube and K&N filter.

Let me know if you guys have any questions. I will try to get a warm start with some revs if anyone is interested. Sorry for the boring video.