Best tuner in town by far. Kelly is a magician. Thanks buddy for everything you guys do for Gravity Motorsports.

Got the adjustable clutch kit for x3, high quality would recommend dealing with them

Kelly of KMS is the genius of tuning motors. Motorcycles, Off-road etc. This guy git my M109R Boulevard Cruiser tuned on the money.

Best performance shop I have been to by far. There customers service is second to none, and there tuning is top notch.

Vwry fast response and have the parts u need.

It is so easy to say no now days. Our 4x4 actuator wasn’t working properly. We brought our car to KMSperformance and MTS Off-Road to have it fixed in Glamis. They had a great attitude, said YES let’s check it out, and fixed it at no charge! We love you guys! We will be coming back for the rest of our performance needs.

I have FB messaged twice, called twice and still dont have the promised bid. Im sure they are capable of doing the work, but Im not getting the warm fuzzies for sure. Its been almost 40 days since my initial attempt.

KMS gave away a billet intake plenum for a Honda Talon at UTV Invasion. My ticket was drawn. I dont own a Honda Talon. They had no problems trading it for something for my CanAm X3. Once I decided on a quick change belt tool, the wrote down my info and immediately emailed their warehouse packaging personell with me ccd. It only took a week and they covered shipping. If they handle stuff they are giving away with this much care and detail. Im sure they take pride and the care in the stuff they do sell. Ill definetly keep my eye on these guys in future purchases.

Kelly and Stephanie are the best, Set up appointment made the drive from so. Cal.Kelly had my 2019 Turbo S tuned on there awesome dyno machine.You wont find this kind of service in so. Cal or knowledge.dont hesitate to make the drive. Thanks again Kelly and Stephanie.

Hands down the best performing tune and clutch work I have had. Kelly and his crew know what they’re doing and their customer service has been good each time I’ve had questions. I would highly recommend!

Good and honest service!Thanks again

Best can am x3 tuning out there. Highly recommend this shop. I live in Oregon and they helped me tune and upgrade my x3. Excellent customer service.

A lot of great products, go fast parts!!

Kelly is the man when it comes to performance modifications on a UTV. He tackled a complex engine by another very reputable builder from out of state. After he worked it over not only is it significantly more powerful than before, but it starts, runs and sounds better. I just think his level of understanding is above most of the engine builders when it comes to performance machines. He is also very helpful when trying to drop off and pick up. It is well worth the two hour drive to his shop.

Had a set of their head studs for my LTR. Was redoing the head and one of them stretched when torquing. They shipped me out a new one same day! Excellent customer service.

Ahead of the game on so many levels!

Nice people good service

I am blown away buy how awesome these people are highly recommend.

Kelly has done a great job tuning my car thru various upgrades. Currently building my yxz engine. He takes the time to answer any questions you have to put you in the right direction for your build.

KMS is a great shop that does quality work. I will be back in the future for performance work and a dyno tune

Kelly was awesome. Really helped me out with a motor rebuild and now my RZR is running better than ever.

KMS tune & clutch added 40 Rwhp to the X3, love the Hp.Its nice racing loud annoying machines at Pismo and passing them. Stage 4... whateverLol.

Got to hang out with the guys and talk shop, well worth the trip from Henderson NV. Thanks for the education and the 34 extra ponies, Im sure Ill be back later for the big boy Tune.

Very happy I went to KMS. Kelly knows it all when it comes to tuning. He explained everything that he did on my rzr. Best money I ever spent on a vehicle, and Ive been playing in the dirt for quite a while. My first ride at the dunes was a Honda 90 three wheeler. Lol Definitely recommend Kelly and KMS. D. Arnold

I first started shopping for an X3 a few weeks ago. I literally looked at every X3 listed for sale on CL / FB marketplace during that time frame. At least a third of the private sellers (and dealers too) I met with mentioned Kellys name and his shop, KMS Performance.I naturally started to look into the ECU / clutch tuning work that Kelly did. I noticed tons of great reviews. Kelly spent a good 30 minutes on the phone with me the first time we spoke, explaining his processes for tuning. Everything he said made total sense. Kelly offered pick up / delivery services as well as part of the tuning fee.I ended up getting my X3 dropped off at Kellys shop on a Sunday. Kelly went out of his way to open up his shop to be able to receive the X3 over the weekend - WOW!The ECU / clutch tuning work was done the very next day. I received follow up communication every step of the way. I received before/after dyno graphs for torque and horsepower.Kelly even dropped the X3 off at the next shop, so I could get my Rugged radio installed. It was so nice to not have to worry about picking up / dropping off my car at the next shop. It saved me at least 4 hours out of my day.What an amazing experience!I wish every shop I took my vehicle(s) to performed as good customer service as KMS Performance! Thanks, Kelly!

Dyno proven, 40 hp gain to the wheels in just 4 hours. Our X3 went from quick as hell to slightly terrifying.

Very nice people. Cant wait to see the improvements in my X3 once installed!

Kelly is awesome. I always tell friends to use KMS performance and get that Dyno Tune!

My Dad, Kelly McLean, is the owner of this business he is a really hardworking man and always wants to make sure his costumers are satisfied.

Kelly is the go to guy for all my performance needs. He is very knowledgeable in person, on the phone or even on his YouTube chanel. Not many shops do this type of quality anymore. Kelly, thanks for the help on the 535 kit last season.It is the biggest BB kit for the LTR and only available at KMS.

Kelly is amazing. Tuned our rzr 1000 big bore. Did an amazing job. He is extremly knowledgeable. All my friends are amazed by our rzr now. Kelly was recommended by Nate at Alba racing in California. And that alone says alot. If u want more reliable horsepower go to KMS. Kelly, thanks

Got my busa back on road and no run around like other shops that claim to know about bikes and dont compare to what kelly knows great shop n work they know how to get it done thx kms ...👍👍👍

Still waiting on a return call from over 10days ago.

Best brains in the biz

Great place and high quality of work....

Best Performance and Service shop in the valley! !!

Kelly is the man!

Kelly is awesome

Talented