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: Exhaust: Why Stainless Steel > Al ? TheMonkey 03-26-2005, 10:36 AM just looking at aftermarket exhausts. other than the fact that stainless looks better... why pay up for it? assuming that you don't live in brutal (salted roads) conditions, what are the benefits? does stainless perform any better? thx Bodysurfer 03-26-2005, 03:20 PM No rust and longer lasting. LATER! sammy 03-26-2005, 07:21 PM Aluminized will rust from the inside out, salt or no salt. Although it is much better than plain steel. Only keeping it for 3 years? Go aluminized. Longer, than stainless. cid` 03-26-2005, 07:37 PM I think that AL can warp much easier and has a lower melting point. Frank Blum 03-26-2005, 07:40 PM It looks better. The aluminized OEM on our truck is pretty good stuff. I just replaced mine after 60K and 3 1/2 yeard on my 02. It looks very good inside and out. Later! Frank Pure Diesel 03-26-2005, 10:14 PM I do believe the factory exhaust is stainless steel. Unless I'm wrong, but the window sticker says Long-life stainless exhaust. Frank Blum 03-26-2005, 10:56 PM My 02 sticker says it is stainless also but I can easily scrape the aluminum coating off with a pocket knife. Possibly the turbo pipe is stainless. Later! Frank Mackin 03-27-2005, 07:05 AM The stainless that the OEM exhaust would be is type 409 SS steel and is a low grade stainless.It will surface rust but not rust through like standard steel exhaust for a long long time. Aluminized is coated steel. Although true stainless exhaust typically 304 stainless wont rust it will not retain it's luster on the truck and in my opinion hardly worth the expense. If you want the look of gleam have the exposed tailpipe,mostly what you'll see anyway, ceramic coated,thats what I did. To each their own TheMonkey 03-27-2005, 10:55 AM If you want the look of gleam have the exposed tailpipe,mostly what you'll see anyway, ceramic coated,thats what I did. thanks for the info. so... mackin, it sounds like in your opinion, for function *and* good looks you suggest purchasing aluminum and having the last couple feet ceramic coated? or buy stainless and coat it? what do you pay to coat it, and what kind of shops do that? thanks. sammy 03-27-2005, 11:09 AM I think that AL can warp much easier and has a lower melting point. Cid, See Mackin's post above... Kennedy 03-27-2005, 11:12 AM No rust and longer lasting. LATER! http://dieselplace.com/forum/attachment.php?attachmentid=1605&stc=1 This shows OE stainless from a 2004 model LB7 stacked on 2003 and earlier aluminized take offs. Additionally, the comments about rust out from the inside are of no concern with a diesel. Diesels do not producelarge amounts of water vapor or acids like a gasoline engine, and actually blanket the interior with a protective coating of soot. The "cayalyzed" trucks went to 409ss as part of a multi year warranty requirement for emissions systems as well as potential heat issues. An aluminized pipe will last a LONG time, but if the coating is severely hot enough, the aluminized coating can be compromised, and it will begin to rust. Many diesels are running 10, even 15 year old aluminized exhaust systems... sammy 03-27-2005, 11:18 AM Thanks Kennedy, I did not realize that about diesel exhaust regarding rusting from the "inside out"! Mackin 03-27-2005, 04:09 PM http://www.dieselplace.com/forum/showthread.php?t=10147&highlight=ceramic+coated Mark Craig 03-28-2005, 01:21 PM Pure Diesel, You are correct the stock systems on all the currently produced diesel Ford, GM and Dodge are T-409 stainless. Mark @ DPPI CHOPJAW 03-31-2005, 05:59 PM Will Aluminized pipes burn at high temps? l Kennedy 03-31-2005, 07:12 PM In my experience, on a gasser yes, on a diesel though it seems to hold very well, and that includes my stationary dyno testing which gets things VERY hot... | ||