the shop i went to installed a new cat for me ,it is bigger than the stock one was now that i look at it by about 25-30% i was thinking that might be a problem because it might be puting more strain on the motor and taking longer for the cat to heat up and do its thing? any one know if having a larger cat than stock is wrong
or a problem ??

 

just get one from ebay..

 

carsound works well too