Originally Posted by blkwings
Codes P0137/P0157, the usual suspects w/ RRE Headers. Once I get then reactivated I'll likely need to drill spacers, then go back to the Stayer tune because I can't live without it now.
Mm no, u get P0421 and P0431 with the headers and no cats, u can get P0137 and P0157 if u had not enough exhaust gasses showing and the your car thought it was running lean, did you have spacers on your O2 sensors to cause that?
I hope so, because if not then you have something else wrong like maybe an intake leak after the MAF, bad injectors of fuel pressure, or something