well real fast i have the C-A header and down-pipe with a cat-back exhaust and a injen cold air intake. recently i have been getting a SES light of p0420 which is catalyst (sp) low afficency bank 1. so i cleared it and it came back on again. swapped out cats. aftermarket to OEM. ran for a while no light. so i swapped them back out yet again. few days go by and here it is again. ses light for the same thing. it will come on if im putting around shifting at 3500 rpm. or im ar the track and im beating on it. my guess is that the cat's internals are taking a ****..... but i have yet to contact C-A about this.(got it in dec.) there should be some type of warrenty???

 

no one else has this problem????? or any input?????

 

well, it is a bad cat...weather or not they will warranty it, you'd have to call and find out.....