Aluminized steel vs Stainless steel exhaust - Ford Powerstroke Diesel Forum
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Old 07-25-2012, 01:16 PM
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Aluminized steel vs Stainless steel exhaust

Hey guys I'm just trying to figure out whether I should go with a Aluminized steel or stainless steel exhaust. I live in maine where in the winter the underneath of my truck sees a lot of salt, snow and what not. I've heard that 409 stainless steel rust almost immediately I just didn't know if the rust is just surface or if the 409 stainless doesn't last long at all. I'm really interested in getting a flow pro 5 inch downpipe back and I have an option to get Aluminized for 340ish or stainless for 370ish. If anybody has suggestions I'm all ears!
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Old 07-25-2012, 01:27 PM
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Stainless no question. Same problem conditions in Wisconsin.
On my cars & trucks when exhaust rusts out I up grade to stainless.
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Old 07-25-2012, 06:15 PM
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Go with the stainless, given enough time and wear, aluminized will rust through. Been there done that. The 409 stainless only gets a surface rust wont ever (for all intensive purposes) rust through. 304 stainless on the other hand wont even get surface rust, and will stay pretty.

Last edited by 44magnum; 07-25-2012 at 06:18 PM.
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Old 07-26-2012, 04:58 AM
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I have to agree with what they said
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Old 07-26-2012, 06:08 AM
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Since there is such a small price difference, go with stainless. Aluminized will last 5+ years even in the harshest environments and actually look better that T409 in that time frame. T409 is a much more durable material, but does get the surface rust like you mentioned so they dont look very good. Most of the exhaust is under the truck, the only real exposed piece is the tip so pick one you like and roll.
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Old 07-26-2012, 08:35 AM
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I put SS 409 on my truck and it was awful. It was covered in surface rust immediately. All of our trucks snow plow,and our dump truck salts. Our dump truck has aluminized that has been on for a few years and it looks beautiful. The clamps have rust but I coated them in never seize and took care of that. My 6.4 has SS 304 and it turned yellow if it was me I would either do SS 304, or aluminized. No matter what coat the clamps with never seize because I think even SS 304 kits have regular steel clamps. My magnaflow came with band clamps and they are in okay shape.
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Old 07-26-2012, 08:51 PM
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Good deal guys Im thinking about holding out and wait for the funding and buy a Mini Maxx so i dont have to deal with the bungs and sensor. Its amazing how buying stuff for these trucks is a never ending game lol but its so much fun!
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Old 07-26-2012, 09:21 PM
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Ive gone with aluminum, cheaper (around here anyways) and I paint black anyways.
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