I am trying to decide which MBRP 4IN turbo back kit to go with. I am torn between the 409 stainless and the aluminized other than the price and material I am not sure. I talked to an installer here in town and he said that I could get by with the aluminized because the diesel puts out so much heat the aluminized will never rot out but it sounds like he is blowing smoke. Any help is greatly appreciated.
Take it from a fellow yooper, go stainless!! But get the 304 vs the 409. I've had aluminized, lasted maybe 3 to 4 years before the muffler rotted.
I had a Banks system 409 stainless, it lasted longer but still was showing corrosion signs after 5 years or so.
304 costs more, but it will be the last exhaust you'll ever need to buy for your truck.
I put a MBRP 304 system on about 3 years ago and it looks like new after 3 winters of U.P. road salt.