so i know that there is a tuner called hptuners for our cars (2004 chevy cavalier 2.2ecotec) but i dont like that whole credit system so i wondering if they make a flash module for our cars that doesnt require credits my buddy has one for his car that will do almost all mitsushity and subaru's but i cant seem to find anything so any help would be awsome

 

you can buy credits to unlock cars on an individual basis, or buy enough to unlock every car that uses that ECM.