April 15, 2007I am about to order an MBRP Exhaust, but I can't decide whether I need the 304 Stainless or the 409 Stainless. I would try to do a search to find information on the topic, but I haven't been able to get the FTW search engine to work. What are the differences between the two grades? I appreciate any and all help...
Forums : Super Duty : MBRP Exhaust, which stainless? (217 Views)
Subscribers : Chasin Tail
April 15, 2007T304 doesn't rust (stays nice and shiney) and T409 will rust (surface rust)
April 15, 2007/\/\yea.
I went 409 b/c it was cheaper. From the downpipe to the muffler everything is nice and shiny. But after the muffler over the axles its rusting pretty bad. I need to polish it again.
If you plan on showin your truck any I say go 304. I wish I had spent the extra money, just b/c it has a shiny finish.
April 15, 2007304 has more chromium and nickel in it, thus it doesn't rust as easily, and costs more.
April 15, 2007Dont do anything but the 304. it makes it sound cleaner (esp. on a 6.0) and you dont have to worry about it tarnishing
April 15, 2007304 sounds cleaner? WTF? That is ridiculous!
April 16, 2007MexTex,
They both perform and sound the same but the 304 looks much nicer. The 304 system also includes a tip where it is optional on the 409 systems.
April 16, 2007i've got the 304 4" turbo back that i want to sell so i can get the 5" if your intrested...i've got the cat delete and muffler delete...but have the muffler at home...hollar if intrested ka_rainwater@yahoo