Such was the case with the Team Cycle World Attack Performance Yoshimura Suzuki AMA Pro American SuperBike. Our engine provider, Yoshimura Racing, wanted us to run the exhaust it had developed on the company's GSX-R1000 race motors; it was, in fact, the same system that four-time 2010 SuperBike winner Tommy Hayden has been using on his Yoshimura Suzuki. But our bike's builder, tuner and crew chief, Richard Stanboli of Attack Performance, has a long-standing relationship with LeoVince, so he was strongly motivated to use its exhaust. Stanboli was convinced that the LeoVince system would be fully competitive, while the Yosh people were worried that the Gixxer might not make full power with an exhaust they had never tested. It wasn't quite a Mexican standoff, but both parties had legitimate concerns.