Originally Posted by GrimmSpeed
Definitely replace the o2 sensor but you should also be looking into a tune. A cobb AP would be an easy and effective solution. You could also work with an E-tuner if you don't have anyone in your area.
P.s. Grimmspeed if you represent the company, just got in your 3" 2x gaskets for downpipe and theyre badass! Would recommend them to everyone!! Only thing I need now is a decal to represent! Lol