Combining stainless and mild stell in an exhaust...

gfourth · May 12, 2008

Hey all, first post!

I just bought a car and would like to "tweak" the stock exhaust a bit. The stock exhaust is stainless steel. Basically what I am looking to do is cut out the resonators and fab an x-pipe, and also swap out the mufflers for something a bit louder.

I have two questions:
1. If I were to use stainless tubing and mufflers and MIG weld it out with er70s-6, how would it hold up with all the heat-cycles an exhaust sees?

2. Similar question to above, but what if I were to use mild steel tubing and mufflers welded to the stainless?

If I'm asking a moronic question, please set me sraight! haha. But, if the above is not a good idea, is there a stainless MIG wire to use?

Really appreciate the help!

Rojodiablo · May 12, 2008

It's a common question, so don't feel bad about asking it. The simple answer is yes, it will weld up fine. The weld will be strong. The only drawback is the weld will not be rust proof. But really, it will last for years with no ill affects.

weldgault · May 12, 2008

Stainless to Steel is common and is welded with ER309L (Best) or anything else you have that that welds good for you. John

gfourth · May 12, 2008

I have some small (I forget the size) 309 rod at our shop, but I would rather MIG it. Would it be worth getting a small spool of .035 wire? I guess it would just to have the wire around. Every now and then we do some stainless work.

gfourth · May 12, 2008

Thank you for the quick response, very much appreciated!

I was thinking that in this application it may be an issue, but you have given me reassurance. I think I will go with the mild steel exhaust tubing and mufflers, it will save me a bit of money.

Combining stainless and mild stell in an exhaust...

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