I searched the forum and I found one guy putting custom header ($180) into his car and got a great result. After I read that, I searched yellow book and found a machine shop near my college dorm. According to the ad, they make racing engine, head rubuilding, custom engine rebuilding, slywheel/resurfacing, and more. Anyway, since it is a lot cheaper to get custom header, I was wondering if it is a good idea to put a custom 4-2-1 header into my Tiburon?
Any suggestion?

By the way, if I decide to buy custom header, how big diameter of header should be? I think SR header is 2.5" Am I correct?

Thanks

 

If I remember right, he got that custom header for that price because he knew the guy who made it. You can expect to pay at least double that for a good, custom made, equal length 4-1 exhaust manifold.