Mike_Boutet

I was thinking of changing out my exhaust to MBRP 4". The tailpipe is already 4" and how much really would the down pipe benifit being 1/2" bigger. So what i'm asking is, has anybody just changed their muffler? If you have ,what did you use, and did it fit nicely with the rest of the stock exhaust?

TurboTed

The 52" Nelson on my 03 was great, with no drone under load. The price was right, from Cummins. I'm probably going with the 40" Nelson on the 05, as I'm leaving the cat on.

53 willys

read this, it has some good info. https://www.dieseltruckresource.com/...d.php?t=117340

53

Mike_Boutet

53, that's all good but they all have 06's with a cat. Mine is an 03 without cat. Just deleting the muffler will be too noisey.

53 willys

yeah your right, I forgot that the older ones did not have cat's

TurboTed

MIke- I see you tow a trailer. Unless you like a drone that'll give you a headache, be careful which muffler you choose. My brother had a 30" magnaflow on his 03. It sounded fine until you were hauling up a hill. He has an 06 long box (with cat) and this time he put on the 52".

TurboTed

Mike- I still have some pictures of the 52" on my 03 in my gallery.