RacingMazda.com
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Coolio. Thanks for the kind words. Did you ever dyno it?
RacingMazda.com said:gaskets are sent with the header kit. Proper install will not result in any leaks. The EGR piece was made long enough to prevent leaks. The seal nut on the stock piece need to be pulled back on intallstion. Keep in mind that every ones will have a different level of difficulty on install, depending on tools and how incline they are.
YES the chrome will turn color after a while.
If you have an od exhaust with a 3 bolt flange, you will have to modify.