OFT Stage 2 stock headers
 

Would it be safe to use stage 2 EL 91 octane tune with stock headers?

Not to be a **** but....I'm pretty sure it clearly says to only run stage 2 with aftermarket/catless headers. Why does everyone ask if something will be ok when it is advised against? /rant

If you are on e85 you can run the e85 stage 2 tune on a stock car.

Edit:
Running E85 on a stock car
http://www.ft86club.com/forums/showthread.php?t=67310

Definitely worth reading everything through multiple times before swapping over. Not a difficult process just make sure you understand what you are doing. There is also a stickied thread where you can post your data logs afterwards and will usually get helpful advice

I read it, but I was digging around and saw a few that ran stage 2 on stock. Sorry I'm a noob and still slowly learning. I can just fill up on e85 then. Would it be UEL e85? Or EL 85?

You didn't say anything about e85 in your post

@Tectoniic answered my first question. I'm asking now if I can fill up on e85 on a stock frs/brz and use stage 2 with the EL e85 tune or UEL e85 tune.

Your stock header is EL. There is an entire thread dedicated to E85.

I have found people to be very helpful here _provided you have done some basic research_ but they arent going to spoon feed you.

The E85 thread will be easy to find.

sounds like you want to do stage 2 cause it sounds cooler than stage 1 but the only difference is the tune it adjusting for the catless headers