Interesting....
I have a buddy of mine with a 91 notch, stock motor but has full exhaust work (no cats). He did a tune-up and put in 93 octane a couple days before his test.....it actually passed.
...I wouldn't dare try mine without putting the cats back on...
I have a buddy of mine with a 91 notch, stock motor but has full exhaust work (no cats). He did a tune-up and put in 93 octane a couple days before his test.....it actually passed.
...I wouldn't dare try mine without putting the cats back on...