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GTR High Performance

4.2 (56 reviews)
Closed 9:00 am - 6:30 pm
Updated 2 months ago

Services - GTR High Performance

Auto maintenance

Auto repairs

Routine automotive maintenance

GTR High Performance Photos

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Reviews With Photos

2007 Shelby GT500
Rau B.

These guys are Mustang whisperers! I have known Ricardo and Gonzalo (GTR) since 2001. NEVER have I been disappointed. INTEGRITY is what I see when I see GTR! These are true friends of mine and couldn't want it any other way! From the bottom of my heart, thank you my friends GTR for your veridical honesty and FRIENDSHIP!!!!

This is a shop I can always trust and rely on for the maintenance of my Mustang with peace of mind. Having a trusted shop to rely on is a great blessing for someone who loves cars.

Derrick L.

Took my GT500 here to have a Steeda Stop the Hop kit installed and also some dyno runs. These guys only work on Mustangs and really seem to know them inside and out, old and new. I recommend them if you have a Mustang. Will use them again even though I live about 45 minutes away.

They did a check on my brakes and saw nothing wrong this is what I saw when I got home.

I have dealt with this shop since 2020 and have heard nothing but a bunch of stories from these guys why something went wrong, they are unreliable, unresponsive to their customers you call and they leave you on hold for 30 mins or so, I might not have spend Tens of thousands of dollars at this shop but I spend my share of what I was asked to pay for work being done to my vehicle this shop made me buy parts I didn't even need because they couldn't diagnose a simple problem, they wasted my time and money that I'll never get back for a shop that's so good at oil changes it sucks to hear that you guys don't do half of your own work and outsource everything and charge double and have countless of times failed to provide good quality work. I am disappointed and hurt that you guys kept my vehicle for 2 months and didn't fix a thing to me and lied to me about working on my vehicle I drove home with breaks on a stretch of 50 miles and all you could say so sorry I hope your kids never experience what you have done to some of your customers karma comes around. If you are looking for quality work and does in a timely fashion I recommended gio's performance.

2002 Ford Mustang Roush Stage 2 Kenne Bell S/C
Robert-Francis S.

All I have to say is WOW. I drove down 3.5 hours from Central California to GTR High Performance to have some work done on my 2002 Roush Stage 2 Kenne Bell S/C. They came highly recommended by Kenne Bell which was conveniently located in the same area maybe a few blocks from each other. Upon arriving to GTR High Performance I was immediately met by Gonzalo and Ricardo (Brothers and Co-Owners of the shop) with smiles and open arms. I immediately felt welcome and a part of the family despite me not being a regular and out of town. They both were very respectful, caring, knowledgeable, and always willing to help. I have never been to a performance shop with such high regards for quality work, impeccable customer service, and strict deadlines. I would recommend their shop to any of my friends especially those with Mustangs. It's definitely worth the drive if you live out in town. I suggest you call them to plan accordingly. The stress of driving down and getting the work done to my car in a timely manner was immediately put to ease upon my arrival to GTR. If you're ever in the area I suggest you stop by and find out for yourselves. They are willing to work with you with almost any circumstances you may have. Work done: 3.73 Gears installed Spark Plugs changed 75mm Throttle Body installed MAF installed Chip updated for 3.73 Gears 2.5 days for install. Thank you again to you both and also your cousin Eli. Keep up the GREAT work. I hope to be seeing you guys again very soon.

Gtr high performance does it the right way.
Moses B.

First off let me say that the customer service was excellent, Ricardo and his team at gtr high performance was great they are very knowledgeable guys and can take care of any performance needs you may have for your mustang, I had suspension work done on my 2018 gt and the work was done the right way, I definitely recommend gtr to anyone looking for a performance shop with great customer service and excellent pricing.

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Ask the Community - GTR High Performance

Review Highlights - GTR High Performance

Absolutely thrilled with the work & customer service from Gonzalo & Ricardo at GTR high performance.

Mentioned in 20 reviews

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Eddie is a awesome and Honesty guy! I have been coming here for about 2 years now for my oil…read morechanges and he is always upfront about everything. I appreciate the explanation of any issues he finds as well as images of the issue. I am happy to say that this is the place to come to for any mechanical needs! I am also glad my family is starting to come to him as well . Eddie! I appreciate you man! Thank you for the top notch customer service and amiability ! I truly value your knowledge in the automotive industry.

My BMW M340i was leaking oil badly to the point my vehicle popped a notification to stop the car…read moreimmediately. In pure panic mode, I pulled over to call AAA. Eddie, the son's owner was willing to stay after hours to wait for my car to be dropped in their garage. AAA took over 2.5hrs to get to the garage, I dropped the key in the slot. He came to the garage early in the following morning to inspect my car. He ordered the part and charged me under $1500, which was just amazing! I wasn't from Upland, had to pay for a hotel, pay for my food and my lfyt rides to get an around. So they helped me out so much (I'm tearing up just writing this) Upon speaking to his Dad, I found out Eddie works on his whole families vehicles.. from Benz to Beemers. That his Dad is proud of what he has built and even more proud of the type of mechanic (little) Eddie is. That they believe in customer service versus charging customers ridiculous prices. I live in San Diego California. I have no issues of having my vehicle towed to Enzo's garage to have any future work done on my vehicle. I am a customer for life and I'm telling the world!

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2014 BMW 535i M-Sport I have been going to the dealership…read morefor all of my repair needs, until the prices doubled. I found Euro Tech and recieved a great quote within minutes of asking for pricing. I had the oil pan seal, engine mounts, and rear rotor & breaks replaced. It took them less than 48 hours to complete and for half the price of the dealership. I recommend using Euro Tech for your import car needs.

I don't know why my post got taken down but here it is again. And also the owner keeps trying to…read morejustify that my dash-cam doesn't record the front of the engine bay? And says "his cameras are on the ceiling". My post doesn't talk about his cameras. I'm speaking about "my dash-cam". I don't need to justify anything nor explain more. Take my comment the way it is or not. I'm not here like the owner trying to explain himself. Just trying to warn others. Ooh also he doesn't try to justify the picture that his business is "not accredited from BBB." Unfortunately I had to contact the business after posting this and I got cussed out and threatened because he saw the post I made. Don't trust snake's y'all! If you are like me and don't like liers don't bring your Audi or Volkswagen or any other car here. They lie to your face of doing something you ask and yet they don't do it but pressure you to doing something "that needs to be done". AND FYI I HAVE FOOTAGE ON MY DASH-CAM OF THEM MESSING WITH MY CAR AND ALSO TRYING TO COVER MY DASH-CAM. I DON'T KNOW BUT TO ME THAT'S SUSPICIOUS. DON'T WASTE YOUR TIME OR YOUR HARD EARNED MONEY AT THE SPOT! This is a fair warning to all you great car enthusiast who love and care for their car. And if you still bring your car to this spot good luck. Hope y'all have a blessed day

GTR High Performance - autorepair - Updated May 2026

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