From a press release:

Grant “Yasuji” Matsushima has opened a shop specializing in race engines and chassis, Matsushima Performance Tuning.

Grant has worked with the following race teams: HyperCycle, Yoshimura Suzuki, Bruce Transportation, and Attack Suzuki. He has worked with Nicky Hayden, Jason Pridmore, Roger Lee Hayden and Ben Spies.

With the 2002 AMA Season over Matsushima Performance Tuning will be accepting jobs for the Willow Springs 200, remaining Formula USA rounds and Suzuki Cup Finals.

For additional information please contact Grant Matsushima at [email protected] or (909) 268-9251.

The shop is located at 11305 Homewood Dr., Fontana, CA 92337.