I don't wish bad things for anybody but when I get screwed I think it is important to let others know from who and how so we band together and watch out for each other. Judge for yourself.... I initially had A&C Performance do a safety check and fuel system inspection on a Viper I had recently purchased from a private party. The car was a beautiful 2006 Twin Turbo originally installed by RSI Houston in 2006 and the car had 9000 miles on it. The car was well sorted out and ran fine. I just wanted the bolts checked and fuel system gone through so I know the car is safe. For those who don't know A&C Performance, they are a Southern California based mechanic shop, based in Murrieta. Todd, the Owner, questioned me why this car didn't have an AEM Engine Management Upgrade. He highly recommended it for a Twin Turbo Application in place of the Split Second Computer. He quoted me a price and said it would be installed by a special tuner he will have fly in that really knows AEM's. I paid him the deposit and that was the beginning of the end with my relationship with Todd and A&C. I trusted his recommendation. After all the work was completed I was excited and picked up the car after what seemed like forever. On my way back to my house it stalled on me abruptly. I wasn't sure what happened. I restarted it and kept going. I also noticed oil leaking on my drive way and in my garage when I got it home. Plus my garage smelled like fuel. What the hell? They had the car forever and a day and I have this now? Things were worse than the day I dropped it off. I sent it back to A&C on a flat bed asking for a quick turnaround. I said drive the car, put miles on it, but make sure this thing is fixed and doesn't stall on me again. I was told after several days of repairs the car is "ready for the second time". I told A&C to please deliver the car to me since their shop was 45 minutes away. Todd, decided to drive the car to me as opposed to flat bedding it to me. Whatever. The next day I took my wife out on a nice Saturday stroll in the car since she had never been in it but only heard about. I was driving along the coast in San Diego. It was great, until the car stalled. I started it back up, it stalled again. I started it back up, it stalled again. My blood pressure was boiling. I was on the stranded on the side of the road. My wife looked at me and said "you have got to be kidding me!". I had no response. It took 40 minutes to get us back home. I had to start the car every time the car came to a stop because it died when the RPM's got low. Any Red light or stop sign it died. The fuel smell still persisted too. When I got home, I called A&C. After listening to A&C's excuses and unwillingness to commit to any time to return the car to me or begin working on it I had no other choice as the consumer, the customer, who had already paid for thousands and thousands of dollars with A&C to take a car that never drove properly from the day he said "pick it up" but to take it to someone that knew how to fix the problem because obviously at this point it wasn't A&C Performance. I chose to flat bed the car to Dan Cragin at DC Performance in Los Angeles. Dan got back to me and said that there were a few items that needed to be addressed to stop the car from STALLING. They were all related to the AEM System. A wiring ground, the o2 sensors installed, and a possible defective AEM or one that may not have had an upgrade done to it that was needed. He didn't know for sure because he didn't open the up. I told Dan get the car fixed and replace the AEM with a unit you have confidence in and I will return the other AEM to A&C Performance. I received the car back with the changes and it runs great and the fuel smell is gone (unidentified leak by A&C at tank). I mailed the AEM to A&C Performance asking for them to pay the bill to get the car fixed. In the end, A&C Performance stuck me with the repair bill that DC Performance charged me to fix their mistakes. And A&C still has the AEM unit I mailed back to them. I am now in the process of getting together all my documenation to present this case in court and to get back my money from A&C. They were happy to take my money but not give it back. I wish it were different but in the end working with A&C on THEIR time lines or lack thereof and getting a car back that didn't run was simply inexcusable and intolerable. P.S. - I forgot to mention while he was installing my AEM he blew up my motor. The Oil pressure reportedly dropped off while tuning and I was stuck with having to rebuild the engine which I paid for the whole thing.