I have a ct20b and plan on upgrading the intercooler with an alcohol spray on the core alone , or going w2a, or trying both. Im on a tight budget of no real money to spend (cant afford big waste of money ic's) . You should go with what was posted above basically. As for the mitsu ic , the ct26 and 20b are much bigger (imo) than the little mitsu 17g and 20gs so how well that is would work is trial and error . I wouldnt put that thing on my car though. Oh btw, I wouldnt try to the least expensive ct20b , got the mr2 board they always have a guy pushing a few , or just ask and youll have a better chance there maybe.