ive got the CPE catless downpipe mated to a 3" into 2.5" custom cat back with generic flowmaster style mufflers. Its not overly loud, and i think my CEL has popped once for not having cats. i guess im lucky because 80% of everyone else with a catless downpipe has CELs out the ass. as far as...
hmm. i had read about some people's sensors crapping out. But the ones i read about had theirs mounted in the engine bay and got wet which i assume is what made them fail. I had planned on mounting mine in the cabin anyhow.
I cant argue with your stance on autometer either, but they dont have...