i think i found the magnaflow part number. 12594. but damn that thing is 250$. thats a freakin expensive muffler

 

flowmater 50 series muffler.. love it..

 

Corsa! Yeah it's pricey, but you won't complain about droning or hearing it all the time unless you have a heavy foot. It'll be the last exhaust you'll get for this truck and the first thing that you'll put on your next truck.

 

well i got the mangnflow but i have a friend with an account to the local speed shop and got it for 140

 

go with corsa, you will love the sound of it!!

 

If your crew cab is a 2500HD then you can get a Corsa, I had to mod one to fit my 1500HD. I have also heard good things about the Hooker Aero Chamber behind the 6.0.

 

The Magnaflow catback for the '03 1500HD is 15782. Not sure of the muffler only # but you should be able to find it on Magnaflow's site. You will hear this muffler in the cab some at 1500-2000 rpm when you are just going slow around town in 4th gear especialy if the TC locks up. It makes nice HP to. Got one sitting under my deck.LOL

 

thank for the advice everyone.

 

I put the magnaflow 12594 muffler and got a 4" tail pipe on my hd and I have to say so far I love it. nice and deep and a real throaty sound.