So if 321 is not enough, how about iconel 625?

http://www.burnsstainless.com/TechAr...l_article.html

 

its been used for manifolds in rare cases. i think its overkill and way too expensive.

 

IF you can afford it, get it.

I'm gonna make an inconel manifold for my car too....I just have to wait until I hit the powerball

 

Its the best material that you can buy for high heat applications. Titanium would be another excellent choice. I believe inconel is 3~4x more expensive than 321 stainless steel. Some rotary and endurance cars use it for manifolds, or other highly stressed parts that have high heat.


[Modified by boosted hybrid, 1:00 AM 4/3/2003]