I have a 97 single auto with aem ems, 1000cc Inj, dual walbros, fpr etc. Well, te ar has no cats, and I am running into an issue...the wife. She LOVES the car, but the fuel smell in the garage is too much for her and seeping into the house. I am sure it has to do with the amount of fuel and no cats. So, if I add a high flow cat, will I need to retune the aem? I just don't want to go to the work of detuning the car and making it less powerful to fix a fuel smell. Btw, there are zero leaks, it is purely the fact it is a catless, heavily fueled car. If I have to detune, I will sell it first.