Looking for some opinions.

[steve99]

Originally Posted by FRSBRZGT86FAN

Yea, I just looked at the release notes in my folder on my computer and that is the case:

OTS Map Requirements:
Stage 1- For vehicles equipped with original header. Other exhaust modifications also compatible. Stock air-box (with or without aftermarket drop-in panel filter) also recommend. Premium grade fuel only.

Stage 2- For vehicles equipped with aftermarket cat-less headers. Other exhaust modifications also compatible. Stock air-box (with or without aftermarket drop-in panel filter) also recommend. Premium grade fuel only.

I'm not sure what you'd use for a catted UEL, I'm pretty sure @steve99 would know

Safe option with catted header is Stage-1 tune. (exception if your using E85 fuel and the E85 tunes)

You can try the stage 2 tunes for catless el/uel header but you would need to log for knock look at afr to see all is ok when running a catted header