When my car was on the lift, my buddy & I noticed the o2 sensor for the cat. was infront of it, so techically speaking if I ran a testpipe, the o2 sensor wouldn't catch it?
I'm not as familar with the Alero as I am with my previous car (had 3 f***in' o2 sensors, a PAIN) so I maybe wrong, this also leads me to the idea that I don't need the hi-flow cat with the o2 bung either...
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