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stainless is bad to crack at least it did on my 855 bc3 engine headers. the company went out of busness cause of it. just run a heavy gauge of mild steel. i,am gonna have some flanges cut on the water jet to experment with a header also. just to play around. stock manifolds seem very restrictive .
bob in tn.
 

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when i get some time i,am gonna have some mild steel flanges water jet cut along with a turbo flage. i think it would be a great improvement if the exhaust runners had 4 equal length tubes all comming together at the turbo as compared to the restrictive stock manifold.
bob
 

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yes them were pistons, melted down the sides between the cyl. wall and piston. buggered em all up. done it at least 6 times on different ocasions. 1200 deg+ on the hot side of the turbo and your livin dangerous. but its my opinion. i like 900-1050 max. and get super long life, no piston dome cracks, no head cracks = no workin on it + a happy bob !!!!!!!!
 
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