Oem exhaust internal metals?

EliteM3 · 06-10-2012, 01:01 PM

Folks, does anyone know for sure what type of steel the internal chambers are made from on our OEM mufflers (E90 M3)?

I'm planning to do the oem mod tomorrow and am concerned about cutting out one type of metal and welding in a different type that contracts and expands at different rates which would lead to premature fatigue.

Also, with respect to the weld, has anyone had any problems with the welds cracking since they most likely are not using the same metal as what you are welding?

tibra1 · 06-10-2012, 02:50 PM

Stainless steel throughout..no issues with my welds.. and my shop used stainless welding...just take it to some who knows what they are doing

kmarei · 06-10-2012, 02:59 PM

I've had my modded OEM exhaust for about 2 years
No issues
Still love it

EliteM3 · 06-11-2012, 12:05 AM

Found a great muffler guy, but he deals mainly with aluminized steel. I am wondering if it is a huge deal to cut out the perforated pipe and replace with aluminized steel.

I know stainless is ideal, but getting it is a pain it seems.

Let me know if I'm crazy for considering using the aluminized steel.

KJ · 06-11-2012, 02:18 AM

Quote:

Originally Posted by EliteM3

Found a great muffler guy, but he deals mainly with aluminized steel. I am wondering if it is a huge deal to cut out the perforated pipe and replace with aluminized steel.

I know stainless is ideal, but getting it is a pain it seems.

Let me know if I'm crazy for considering using the aluminized steel.

Aluminized steel rusts pretty easily. I would avoid it or else you might end up having to redo the whole thing later which costs more money and is a waste of money, time and energy!

- KJ

tibra1 · 06-11-2012, 02:36 AM

Quote:

Originally Posted by EliteM3

Found a great muffler guy, but he deals mainly with aluminized steel. I am wondering if it is a huge deal to cut out the perforated pipe and replace with aluminized steel.

I know stainless is ideal, but getting it is a pain it seems.

Let me know if I'm crazy for considering using the aluminized steel.

Use have to use stainless.you can buy it here in 1,2 and 4FT lenghts

http://www.amazon.com/gp/product/B00...ls_o04_s00_i00

06-10-2012, 01:01 PM	#1
EliteM3 Private Drives: 2009 E90 M3 Join Date: May 2012 Location: Morgan Hill, CA Posts: 88 iTrader: (0)	Oem exhaust internal metals? Folks, does anyone know for sure what type of steel the internal chambers are made from on our OEM mufflers (E90 M3)? I'm planning to do the oem mod tomorrow and am concerned about cutting out one type of metal and welding in a different type that contracts and expands at different rates which would lead to premature fatigue. Also, with respect to the weld, has anyone had any problems with the welds cracking since they most likely are not using the same metal as what you are welding?
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06-10-2012, 02:59 PM	#3
kmarei Major General Drives: 1988 M3 Evo II Join Date: Jul 2008 Location: Reston, VA Posts: 6,035 iTrader: (32)	I've had my modded OEM exhaust for about 2 years No issues Still love it __________________ "There are two opinions in this world. Mine and the wrong one." -- Jeremy Clarkson

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06-10-2012, 02:50 PM	#2
tibra1 Banned Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC Posts: 6,779 iTrader: (4)	Stainless steel throughout..no issues with my welds.. and my shop used stainless welding...just take it to some who knows what they are doing

06-11-2012, 12:05 AM	#4
EliteM3 Private Drives: 2009 E90 M3 Join Date: May 2012 Location: Morgan Hill, CA Posts: 88 iTrader: (0)	Found a great muffler guy, but he deals mainly with aluminized steel. I am wondering if it is a huge deal to cut out the perforated pipe and replace with aluminized steel. I know stainless is ideal, but getting it is a pain it seems. Let me know if I'm crazy for considering using the aluminized steel.