Originally posted by "Someone"
Originally posted by StreetRacingOnline
Where did you hear that SS manis didnt crack? Stainless Steel is the 3rd most emmorphous elements in the world. And Cast Iron will not melt under turbocharged conditions. I would give any SS manifold 10K - 12K miles before they crack. Sure they flow better cars that arent daily driven. And what really sux is the fact since they morph(change grow strech etc...) so much the more you brace it the more they are prone to crack. CAST IRON is the best manifold for street daily driven cars IMHO SS is so overrated... Like Sabri said coat the cast iron and port the shit out of it you will flow the same and still have reliability.
Sorry I forgot they offer cast manifolds for Hondas. But if a manifold needs to be fabricated Stainless is the way to go. Carbon steel may not crack but only because it has long since melted away. Besides it depends on how the header is built if it cracks or not. The guy that built mine has slip fit primaries into the collector so they can grow and move without cracking. He continuously evolves his designs and each one is better.
Take a look at this page for a step by step buildup
http://members.tripod.com/~Red_Header/LTH2index.html
Take a look at this page for the rest of his cars.
http://members.tripod.com/~Red_Header/Red_Header1index.html
BTW the wheels and tires on his Daily Driven full weight all accessories SVO that went 7.80s at 93 mph are mine
PS Mines gonna be faster