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...
The price on the modified header is $350. We did all we could to make it bolt up without any modification on your part. 10 were sent out 2 weeks ago and I am not waiting on feedback.
I left the original egr nipple just in case you sell it on day then you still have the mx/626/probe and protege...