I would go with kpro if you plan on going I/quality Header/Exhaust and trying to get the most power out of your car. If its just a toy and you dont care about getting the most out of your car then go with a reflash, but with kpro you can street tune your car yourself doing the AF's and timing and then at the dyno tune Cam Angles. Its awsome cause RSX's have built in Widebands that is the primary O2 sensor!!


But if your not that serious and probably would never go too crazy or want the most power out your motor again i suggest a simple reflash which is basically like riding k pro wiht a base map. And DONT go wiht a JDM ECU, you might as well go with a reflash for what they go for.