will the SES light come on with long tubes and a catted mid-pipe? what combos do people have for long tubes and catted mid pipes, how do they work for you?
yes it can but not for all . It did trigger it on my car so i had to get mils and problem solved. It also did on my friends car with the same setup except he has a bbk catted h.
The front O2s can trip to with long tubes because the exhaust cools down to much in relation to where the O2s are placed on LTs.
One way to fix it is to exhaust wrap the last section of the header to keep the heat up, another is to have the tests time lengthened with a custom tune.