my buddy
Thanks in advance.
Thanks in advance.
MY guess would be that your friends check engine light is on, right ? The high flow cats, flowing more are not causing enough of a difference in the reading between the upstream ( before Cat) and downstream ( after cat) causing the issue.
That being said, you said you'd have your cam,full exhaust, and new wheels/tires on by the end of March. Is it on? Thought I saw you and it seemed you were still 100% stock...........

