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  • News Item

    17 :: April :: 2009

    Performance Tuning - Corvette / Z06 Corvette
    EFI-Tuning is proud to announce that our performance...Read More
  • News Item

    15 :: August :: 2008

    2005 CTS-V (Z06 Corvette 5.7liter) Performance Tune

    Tomorrow we're running a performance tune as well...Read More

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About Josiah Coy of EFI Performance Tuners

From Kushan Peykarian

At Excelsior Motorsports our sole interest is to give our customers what they want, maximum realized performance with the highest levels of reliability. We take pride in our work, and strive to deliver quality workmanship in a timely manner.

We have at our disposal new and accurate high end equipment. Kushan personally has 26 years of experience in the high performance market.

This enables our company to satisfy your performance expectations. We get the job done right the first time.

corvette dyno tuning

Kushan's 900 hp Twin Turbo Z06

twin turbo corvette z06