Just put a new cat in, also took a ride w/o the cat and still no increase in power <img src="/forums/images/graemlins/confused.gif" alt="" /> Maybe a little bit better throttle respons. The old cat had 20k / 15 years on it so it didn?t hurt to get a new anyway...must be the bad compression in the 4th cylinder...will check up on that later this week.