Started off small earlier this year with a cam, e85 and a tune. Moved along to a SuperCharger and suspension and than fuel system, back to e85, forged bottom end and axles upgrades. Also threw on a breather to avoid blowing out the crankcase seals. Everything was discussed, planned and detailed out with CMS and Ryne and his staff guided me the right way to do it right.The professionalism, the support and straight up car knowledge is on point. CMS knows what they are doing, they know how to tune and when I thought I had issues, their customer support was above and beyond what I had expected. Its hard to find a quality shop like CMS these days, but I am blessed to have them in my backyard.

I had a hard time finding a reliable GM performance shop around Southern California for my 2007 C6Z. After some research and phone calls, everyone pointed to Cunningham motorsports. I took my car there and everyone there was very friendly, knowledgeable, and honest. Had some work done to my car and my C6Z came out of there a completely different car. My car is a monster now! Going back there for E85 conversion and more! I would highly recommend this shop to all my friends and family!

Solid performance by solid people. They go out of their way to make you feel like you are top priority and I really liked that. Best tuner in CA right here.

My wife and I have 3 Corvettes, one c5 coupe, c5 Z06, and my 08 Z06. I wouldnt take them anywhere else. Ryne, on numerous occasions has recommended different upgrades for my car that i really enjoyed, and other items that I didnt need (that would just waste my money.) After he tuned the coupe and my Z06 they ran awesome! I cant wait to get my c5 z06 to his shop so he can do his Magic! I wouldnt trust anyone else. And a big shout out to Texas Mike!

These guys have tuning and performance down to a science. Not only do they have an awesome shop full of skilled mechanics, they build some of the most badass cars that break hearts and necks on the drag strip. They have worked on all our SEMA projects and have helped achieve great notoriety. Highly Recommend these guys!

Best tuner in town! if its a v8 it will have every last reliable horsepower squeezed out of it! customer service above and beyond!💪

I am not familiar with their knowledge on GM but with Ford they showed nothing nor the willingness to satisfy the customer. The front man Terry is a flake. Do not trust anything he is saying as I witness him working other customers the way he worked me. I stayed 20 minutes in front of his counter 2 feet away and he did not noticed he has a customer. He was just working his texting.Pretty shamefully on Cunningham approach to customer satisfaction.My personal experience is that they did not produce a workable tune which resulted in my engine failure.After writing this review instead of fixing their bad work all Cunningham owner and employees wrote bad reviews on my company on line presents about services rendered by my company to them. They never had to deal with my company nor solicited services from it. All their complaints are fabrications. If this is their attitude toward business imagine the type of work they are going to do for you.This company and its stuff is a danger to any customer and should not be in business.They also wrote a response which is all lies. I wanted a working truck. They took the job. They were on the job for 1 day. They did not keep the appointment to fix the tune. They told me to try it and see how I like it. The truck broke.I have no pleasure to start a feud with this type of dishonest people but also I hate the idea for them taking advantage of other people. They just wrote 4 false reviews on my company plus I witness first hand in their shop how bad Terry treats his other customers.

Quality work. Would send any GM performance vehicle here. A+

Ryne and his staff are awesome and stand behind their work. If you want the best this is the place to go.

If you want to be given the cold shoulder and treated like livestock, this is the shop for you. Whether they are Gods gift to the tuning world is open to interpretation. Their scheduling is disorganized, and their attitude clearly needs some tuning since I am not the first to post a disgruntled review. CMS is a good example of a shop who grew fast due to their forum presence, and the extremely high demand for LS tuning and modification services in the Socal region, but then let its popularity get to its head. Take a look at the attitude and arrogance behind their responses. Believe me there are plenty other unhappy customers who havent found their way to Google reviews. Cue the we cant find you in our customer database therefore your review cannot be substantiated !!!

CMS has done three H/C/I C6 Z06s for me that all made over 600 RWHP N/A. The last one was a Forged 14:1 LS7 for nitrous and it ran awesome. Couldnt be happier with this shop.

“CMS Stage 4 whipple package” you mean whipples supercharger kit. Always claiming everything as CMS custom when it’s not. And the owner is very rude and disrespectful.

Everyone at Cunningham Motorsports was amazing!I had my 2017 Chevy Camaro SS Procharged with a P1X Stage 2 system and they also installed my ARH Long Tube System Headers with a Dyno Tune.All I can Say is WOW!! The cars feels like a different Monster and has even more performance then a Baseline 2017 Chevy Camaro ZL1 they dynoed on their youtube page!I could not be happier! :)Micheal, Ryne and Troy were all professional and really cared about my vehicle. They care about performance and are not looking for you to just blow money. If a Mod doesnt make performance (or isnt safe), they will tell you not to buy. They truly care about the customer and their vehicles.I will only take my Camaro to Cunningham.No matter what your vehicle, I recommend hitting Cunningham first before all else!!Thank you Guys for all the hardwork!!

This is my first review i ever do on anyones site as i do not care or do not try to talk bad about anyones buisness although ive never been given horrible customer service like this by anyplace. I always believed that this was one of the best places to go for LS engine tuning on the southern west coast but I was wrong ive expirenced bad customer service before but these people so far top them all i read the reviews before making an appointment and ive incountered some that did warn you about this place but at the time I did not care to listen, I made a big mistake driving 3 hours for my tune here thinking it was going to be worth it... these people are very rude... At first i thought it was just the guy in the front desk probably having a bad day but then i believe it was the owner that walked in did not even dare to talk to any one walks past his customers into his office, I will never go back to that place again and will not refer it to any one that ask about them hope you do not have the same expirence I had...

I have a gto 2006 i had cammed and procharged and boy let me tell you, these guys are pros and then some! every gearhead want fast and RELIABLE, well i had this gto for a year now EVERYDAY DRIVER, 0 PROBLEMS, hats off to the guys at cunningham!

Promised 550rwhp gave 600. clean work.. 09Z51 LS3 vette. just got it back. Ryan and Troy are good guys. didnt even try to take advantage of an old guy. (good luck) Ive been around the block a few times. looking for some of those built foreign jobs to play with. not on the street!!!!! (CRW Sun City) going to have to upgrade tires. ryan recommends toyo r888. have goodyear f1 supercar that cant hold the power at all. Tires next!!!!! never driven in the wet!!!!

Brought in my 2008 c6 z06 in for a typical heads/cam job. They told me it would be done in roughly 6 weeks due to the busyness of their Machinst. I was pleasantly surprised to get a phone call 3 weeks later stating my car was done and making 553 rwhp and 496 rwtq. Flawless drivability and flawless performance. I wouldnt take my car anywhere else.

Attention to detail and customer needs, with realistic advice.

CUNNINGHAM MOTORSPORTS is simply the best. Their reputation precedes them. They are actually so good at what they do that I had to spend 2k on transportation fees only just to have my Z delivered to them from New York because this is where I live unfortunately thousands of miles away from their shop. They are doing a very serious 700whp NA build for me. I absolutely recommend them to anyone without hesitation. Let me put it this way: if you own a real American sports car/muscle car and are thinkin about upgrading her to make her better/faster/more reliable and you use a shop other than CMS to do the job, you are not a true petrolhead with all due respect to the rest of the performance shops out there.

Cunningham Motorsports is one of the best shops in the west coast for sure. Cant speak for the east as Ive never looked that far. They will tell you straight out whats best for your build and needs. Ryne will let you know how it is of the back with no and and buts. Ryne has tuned my 2012 Camaro after trying different tuners back in 2012 when it was Whipple Supercharged. Since then hes help me make decisions and have always worked. Started back making around 600/700 SC to my different builds and made 1781 RWHP on my last build. Unfortunately I had a horrible accident and that was the end of my car. next car is going straight back to CMS!

Great shop. I had a 2012 Camaro SS with Twin Turbos which had the cam bearing go out and ruined the motor. They quickly got the car in the shop and helped me come up with a plan to build the motor for the power level I wanted. Ryne even suggested to get a ZL1 crank to save some money on the 10k budget. Ryne and Mike were always updating me on the progress. Finally the car was done and while on the dyno one of the Turbos let go and we got new Turbos ordered and put on. The shop is always there for questions and concerns. The car is still running strong and has had zero issues. Great shop and I would recommend them to anyone. It may take time to get your car in the shop but if you want the best its worth the wait.

Did a lot of research on CMS before calling. Checked out Vids and forums. They ranked at the top so I pulled a $200K+ build down from LA to Temecula to see these guys tune my LS7. These guys are no joke. Professional, courteous and took the time to explain issues and advise options.The car was previously tuned by a name tuner back on the East Coast. Had an event where the engine would shut down at high speed and also experience intermittent periodic engine shake with no throttle response at idle. Ryne and Mike showed the errors on the computer, explained it, and provided a corrective action plan within 20 minutes of my advance appointment arrival. Ryne was able to squeeze a surprising amount more HP out the engine and made it run smoother. Worth the drive....even if I lived out of state. These guys are buried in work. Make an appointment in advance.

They could use more help.but ryan is a cool no bs guy. A+

Best damn LS tuner. PERIOD...

Work was excellent tune sucked

My son tall me thats his Camaro is the only peoples he will make sure can repair 100 %within any problems.

Wouldnt take my G8 GXP anywhere else, 4.5 hour drive for me and worth it....

Not very business oriented.

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