Oft
 

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I believe stage 2 is only for castless headers so you would have t go stage 1. However to get the most out of the header you would have to get a custom tune from oft for another $200.


Anyways that's my thoughts, id wait for the more experience members to answer :)

I personally have FT86 Speedfactory's Catted UEL and I'm running stage 1 for the winter. It needs to warm up so I can go back to the corn juice and stage 2! I've heard that some people were able to run stage 2 provided the cat in the header was a 200 cell high flow cat but I haven't tested it on my own car yet.

EDIT: Forgot to put anyuseful info :bonk: The best way to determine if it works with your header specifically would be to just take datalogs with the car on the stage 2 tune. Obviously don't start WOT but do some slow driving at low rpm and if that seems good step up to a few 3rd gear pulls. Definitely post the logs in the Data logs thread and some people who know a lot more about what you should be looking for can help.