tommyGS3

iTrader: (4)

i was thinking of installing a hi flow magnafow cat and was wondering would the cat make the check light engine go on?

NoRyceGS4

only if they dont properly heat up. generally if they are in the same location as your stock ones you shouldnt have a problem. the only times i have seen problems is when they are installed with long tube headers which push the cats further down the exhaust.