My hardworking 2000 A6 has 118k miles and needs new catalitics. Stock are $1,400 each ++. I've wanted to tweak performance for some time anyway.... so does anyone have a suggestion.?
XtreamFlow in Fresno CA sells performance cats on the net and sez they have the only CARB approved aftermarket cats in the state.
Observations, comments anyone? Thanks!
Pete van Nuys