Who's still tuning for these cars? I have a Hackish/Fastworks tune from back in like 2013, however it never satisfactorily dealt with my RRE headers throwing codes for the downstream O2 sensors. I'd be more than willing to pay a tuner who can remove the P0157 and P0137 downstream O2 sensor codes from my car, Stayer? Hackish? Someone else? Who's tuning these things nowadays?