A friend of mine owns a welding and fab shop so I asked a him to get me some 304 stainless for making a downpipe and screamer tube, he does not think its a great idea, his thinking is it will crack and recommended 321, all well and good but it costs a fair bit more than 304. What are you guys using and have you had any problems?

 

i think its safe to safe the industry standard in terms of fwd down pipes is 304 stainless steel.... i have no idea why hes saying that.


mike

 

304 for sure. No reason to doubt it.

 

for headers, i would recommend 321, but for downpipe 304 is ok.

if you read on burns stainless, they have a pretty good article on 321 vs 304 for fi vehicles.

 

Thanks for that, was a good read.

 

So I now have all the bends I need to make the down pipe but one of the flanges is 316 as is one of the bends, can I use 308l filler wire or will I need to use 316l to joint 304 to 316? Have done an interweb search but could not come up with a solid answer.

 

I would just use 347 if you read more on burns stainless you can use it on all stainless to stainless joints and you use 309 to join stainless to mild


Posted from Honda-tech.com App for Android