apexi vafc2 is great, right now i only have the vtec control and the wide throttle map adjusted. the installation instructions they give you are kinda confusing. there is alot of things you can adjust and they dont say what to do or not to do, they just basically tell you how to use. so i suggest letting an experienced tech tune it. the engine feels alot smoother and top end has greatly improved. last night i went for a ride and twice guys rode up and tried me, first was a eclipse and then a v6 mustang, left them both. before i could only hang with them. and soon i will get it dyno tuned, cuz i know i still have more power waiting to come out.