Cobb AccessPort
I'm looking into buying a test pipe (Race pipe) for my 2014 EVO X GSR. The car is stock other than a catback and COBB stage 1 ots tune.
1. I'm wondering if it will run safely on the COBB Stage 2 OTS maps with a test pipe?
2. Is it necessary to get a wideband (AFR) guage? What could happen if...