Ok, I have an 99 i4, this is a matter of material strength and functionality, I believe it is viable to post here. I have just acquired a set of megan clay header w/ a new box of 50ft x 2in. heat wrap.....really expensive stuff...the header has like 2-3 years use, but is in great shape despite the small scrape from where the guy bottomed out once. The heat wrap is still in the box by the way. Heres the problem. I have NEW Tom Motorsport of Japan header sitting in my room that is Stainless Steel. I just got a Megan stainless steel exhuast, so I could go all Megan, or go all Stainless. I like Stainless, cause it doesnt crack and such. http://www.tommotorsport.com is where you can see the stainless header. What should I do? Which one should I keep? Which to sell? Also, and most importantly, which offers the most gain and the best structural integrity?