Does the Cat Overtemp protection stay on with the JRE Flex tune? My understanding is that it has to be turned off but could definitely be wrong. I dont wanna remove headers/OEM cats etc.
How was the wiring on the FuelMaxx, any write ups? Curious your SAE numbers before/after too and if you're an A10 or M6

Your sig shows other mods, intake/throttle body/2nd cat delete/catback etc too fyi.