By open header you mean no cat or muffler right?
It will make your engine more efficient (reduced backpressure). Basically, its good for you and bad for the enviroment & your neighbors. Loud and dirty is a bad combination, the police usually have a problem with that kinda thing. _________________ If you feel like you're in control, you're not going fast enough. ~ Mario Andretti
I have a problem w/ that kind'a thing! I want my daughter to be able to breath when she gets older. Also, it will actually probably hurt performance just to run it right off the header. There should be at least a 3' flared tube on the end of it. Check out some of the top drag cars. No straight header there. Also check out Hytech, thier web-site is more than kick ass. _________________ DC4's are the shizzle!!
No, you don't need a fuel rail! Unless you are pushing some crazy numbers!!
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