I like the AEM and tuneablity is great. The downside is you have to deal with AEM directly on ecu problems/repair. I takes 2 days after leaving a message to talk to someone. This is my experience with them as of now. Called AEM on a friday. They called me back monday at 1pm(11am cali time). Sent the ecu out airmail. They recieved it thursday. Just talked to them today(monday). I was told it is being fixed and will be airmailed out today or by the latest tomorrow. I will see the ECU by Friday the latest. It took about 2 weeks from start to end. This has been a pain in the ass. Hard to say it's worth it. I love the AEM and AEM has done all they can to keep me happy. Unfortunately they are in california so it takes time to fix things. My other problem is the injectors which i sent to RC. No word yet but i expect then back by the end of next week. I have deciced to buy another car for a daily driver so i can sleeve my motor and just drive it when i want. Since i spent my motor money on the new car i expect to build the sleeved block by the end of April. I cant deal with the headaches right now of having my car break when i need it. I go through all this just to beat up on a few..