It was a "race" tune. I drove it home that night and got 28.8 MPG over the 70mile drive. LOL. It was my street tune turned up for 100 Ocatane. I ran 93 pump with Race Gas brand supplement to bring it to 100ish octane. I logged one of the runs, and showed zero knock, and was just a great tune. I actually had them back down my hot race tune a couple PSI because I had fueling issue for a split second on 2-3 shift. So it actually was a touch lower boost than the one I ran 12.1's on.