I use to sell hypertech chips for domestics and new they sucked but when they offered me the shogun tuner for free, I could not refuse. Now, I regret my decision. The piggy-back unit fried itself. Luckily, it did not get to my ecu. I have been without my car for 3 weeks trying to figure out why my car would not start. Tonite, I found out why. DON'T buy this piece of crap!! thank you for listening.