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KMS Performance


We post pictures and stories often, you can follow us on Facebook, or check back here for the newest bike builds and dyno sheets!




About KMS:

1998 – KMS Performance was formed to explore the possibilities of single cylinder boosting. We started with turbo charging the Honda 400ex. At the current time, there was no turbo solution available for any single cylinder worldwide. The consensus from almost all turbo system makers was that there was no solution.

1999-2000 – KMS Performance releases turbo systems in kit form

Honda 400ex and Bombardier DS650

These systems included intercooling, fuel injection with 3d mapping, closed loop operation, and were unparalleled for power.

2001 – 2005

*Release of the Raptor 660 turbo system (FI and intercooled)

*Release of the Honda TRX450 turbo system (FI and intercooled)

*Release of the YFZ450 turbo system (FI and intercooled)

*Many turbo system builders come and go, while KMS remains the number one turbo system builder for the ATV market.

*KMS embarked on the quest for ultimate endurance and performance.

It was decided to compete within any racing venue that would allow a turbocharged ATV. This was to test the performance potential as well as input to enhance reliability. KMS secured titles in Four Stroke Wars, Planet Sand National Sand Drags, and even went as far as Best in the Dessert! (Until we were outlawed)

Racing our product provided a method to better enhance the longevity of our product under the most punishment we could find. We incorporated this information into turbo systems to not only enhance drivability and power, but to make a product that will keep working in the harshest forms of use.


*Introduction of the Custom Turbo Build

After pioneering the way for single cylinder boosting, Kelly McLean decided that custom building needed to be incorporated. This would allow exploration into new and exciting turbo technology. So when customers called for kits not currently available, we would setup shipping arrangements and build a custom system specific to the intended use. The response was overwhelming. A steady flow of bikes were constantly being built and new tech came to the table month after month. By the end of the year, KMS Performance stopped offering kits to ship entirely and focused on exotic custom builds.


*KMS Custom Turbo Building

Our customers were looking for over the top builds that could be used as weekend warriors and boy did we deliver. Here is a quick snapshot of the some models we have boosted under our Custom Turbo Program:

DS650, Raptor 660, Raptor 700, YFZ450, TRX450, Predator 500, LTZ400, RZR800, Rhino 660 (supercharged), RZR900 turbo, RZR900 supercharged, Commander 800, Commander 1000, Maverick 1000, CRF450, KTM450, KTM500…and more!


*KMS Turbo Kits are now available in ship format!

After 7 years of creating custom builds, KMS Performance has enhanced turbo system tech that is many years ahead of the competition. Through custom building, we were able to analysis and maximize efficiencies in all aspects of a turbo system. Intake geometry, compressor piping structure, intercooling, plenum geometry, blow-off valve sizing effects, intake velocity stack geometry, header volume manipulation, muffler geometry and tuned length effects, and more. All of these areas affect the ultimate outcome of not only the performance and longevity of your turbo system, but also affect the feel. Our kits will offer unmatched power gains, incredible durability, and amazing throttle response (lag times under 0.20sec!)

“Because we have taken the time to understand how each individual part behaves and ultimately adds or subtracts efficiency (power) to the turbo system, we can create systems that truly stand apart from other “kits”. After 7 years of watching the small engine turbo market unfold, I am excited to demonstrate what it means to be KMS fast!”

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Learn more ABOUT US

Thank you for visiting us!

Thank you for choosing KMS Performance. We continuously explore the most cost-effective methods to solve your horsepower and reliability needs. We provide a wide range of products and services to covering from very basic to extreme exotic. If you demand expert technical information, excellent customer service, untouched warranties in the industry, reliable race engines, and superior products, then you need KMS!

KMS does not offer Chassis, paint, tires or bling. The focus is on research to develop the best products for your vehicle at the best prices.

This is not an “online” parts store where you can find the lowest price. This is, however, where you can find the best products at the right price as well as the information you need to make the correct choices.

LTR Drag Bike Built by KMS PerformanceKMS has been developing performance products for on and off road vehicles for over 13 years. Street Bike, Atv, Utv, Dirt Bike, Turbo, EFI, Nitrous or anything else that makes you “go fast” can be found here.


Lots of new products being added to our new online store daily. We have shelves of performance parts in stock, from pistons, gaskets, cams, intakes, cylinders and clutches. If you don't see what you are looking for just give us at call at 602-442-4340. Store hours 9:30-5 Mon-Fri. After hours drop off and pickup available by request.

New parts to checkout!

POLARIS RZR XP 900 Cylinder to Head Stud Kit

These bolts offer:

  • 8740 CHROMOLY

RZR XP 900 Studs

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