Who we are

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At Alliance Motorsports, we live for speed, power, and precision. Based in San Jacinto, CA, we specialize in high-performance boats, watercraft, off-road sport vehicles, and diesel engines—because your machines deserve nothing less than expert care.

Whether you're tearing up the water, dominating the trails, or pushing diesel power to the limit, our crew of master mechanics has the skills and experience to keep you running at peak performance. We don’t just fix engines—we optimize, upgrade, and fine-tune them for maximum power and reliability.

From full engine rebuilds to custom performance upgrades, we’re here to make sure your ride is ready for anything. No shortcuts, no compromises—just precision craftsmanship and the passion to keep you ahead of the competition.

Alliance Motorsports – Built for Speed. Engineered for Power. Ready for Anything.