Built by Riders. Built for Riders.

Orange County's Premier UTV Performance & Repair Shop

Diamond Performance isn't just a parts store — we're a full-time UTV performance shop located in Mission Viejo, California, with over 14 years of experience in off-road racing and performance builds. We live and breathe UTVs, and everything we make reflects that passion.

Our Story

We started as a hands-on performance and repair shop, doing sales, installs, and full UTV builds right here in our Orange County facility. Over the years, we kept running into the same problem: the aftermarket parts our customers needed either didn't exist, didn't fit right, or weren't built to handle real off-road abuse.

So we built them ourselves.

Diamond Performance began designing and manufacturing our own line of UTV accessories — dash mounts, catch cans, engine access panels, and more — all engineered in-house to fill the gaps the market was missing. Every product is designed by riders who understand what it takes to perform in the desert, the dunes, and on the race course.

What We Do

• 🇺🇸 USA-Made Accessories — We design and manufacture our own line of precision-fit UTV accessories for Polaris RZR and Can-Am Maverick X3. Built in-house, shipped nationwide.
• 🔧 Performance Installs — From radio and intercom setups to full performance builds, our technicians do it right the first time.
• ⚡ Wiring & Electrical — Expert UTV wiring solutions for lighting, communication systems, and custom electrical builds.
• 🔩 Clutch Tuning — Maximize your power-to-ground transfer with professional clutch tuning tailored to your machine and riding style.
• 🛠️ Repairs & Maintenance — Full-service UTV repair shop. We diagnose, fix, and get you back on the trail.

Why Diamond Performance?

We're not a warehouse. We're not a dropshipper. We're a real shop, run by real riders, who stake our reputation on every product we sell and every build we complete. When you buy from Diamond Performance, you're getting parts designed by the same people who install them — and that makes all the difference.

"They are usually the ones talking me out of certain upgrades — they help me spend my money in the right areas." — Sean

"They only offer race quality products. If they don't recommend it, it's usually for a good reason." — Martin

Visit Us or Shop Online

Based in Mission Viejo, CA — serving local riders for installs, repairs, and builds, and shipping our USA-made accessories to riders nationwide.

📞 Have a question? Contact us here or browse our full product lineup.