ATE performance build this CAT C15 glider for me and it turned out to be everything i was hoping for and MORE! The cleanest job you will ever see! The engine runs smooth, power and sound ... just ridiculous! Can’t go wrong with ATE Performance and Eli!

By far the Best engine and performance shop around! Eli and crew rebuilt my cummins engine and replaced my clutch. They took excellent care of my truck, and I couldnt be happier with the results! ATE has my HIGHEST RECOMMENDATION!

Not sure how this place has 5 stars... Called to see if appointments are necessary and they said just come in. When I come in they say its by appointment only and were slammed. Receptionist wasnt helpful at all and doesnt know what kind of work can be done or not. Owner was rude as well but it seems like he was having a bad day dealing with incompetent technicians most likely.

Good service, little slow , the owner is a nice guy

#1 in the Industry! ATE is the place for all your Diesel Engine: rebuilds, repairs, tuning and High Performance Needs. You cant beat Quality and thats what ATE offers! Nothing but the Best!!

Eli is the best in the Business. Anything with engines and performance or ECM programming this is the place to go. This is a Late Review but I got a new head installed about 3 months ago and some ECM tuning and truck has never ran better.

One of the best shops out there ....nice ,friendly and fast service....

The best experience I’ve ever had with a mechanic shop. Eli is a wizard! The motor work and programming is top notch. You get what you pay for, no shortcuts at this shop.

Brought my truck in for a inframe and a tune. Great customer service, truck is running great. Truck was completed at quoted time. Ely is the best in the business. Definitely recommend.

Truly recommend this shop had my cam replaced and got the truck tuned. Definitely makes a difference. Get your stock ECM a tune now!

I was there this week to get major problem in my truck fixed this guys went above and beyond ,can you believe three mechanics is fixing my truck at the same time they got me in and out within less than 4 hours they charged me very low reasonable price they are *highly recommended *and I am one of their customers I cannot go to other shop nobody will treat me as good as they do. I was there at the same day and time when👇(علي حسين) came into the shop to ask about his Volvo injector cups replacement price quote and he also said the dealer wants to charge him $6,000 for that,the shop manager said its usually cost the same price to maybe more maybe less some other places, the manager didnt say anything about $8000 dollars, علي حسين is not telling the right story he is lying.

Definitely recommend them,Eli, is a real knowledgeable person when it comes to engines.Thank you805 Transport

Great service friendly staff

Awesome crew super helpful

I am not a person to review, but this company/owner of the business goes above and beyond and needs to be recognized. From the initial start of me walking into the shop I was greeted by the owner, who was very respectful, and knowledgeable of the engine and what it means for a small owner operator to be down. He always answered my questions, explained a head of time what exactly was needed. Done it a timely matter. Always called back, and let me know exactly where we were in the process of my truck. He has tuned all my trucks I owned, and because of his great knowledge I just recently did an engine rebuild with his shop. He will always have my business for any truck related issues. I STRONGLY recommend him to anyone in this business, looking for a reliable, honest, and respectful owner of a shop.

Not only Is the work first rate his knowledge is extensive. I found Eli to be honest and ethical. I just had my jake brakes fixed and an overhead and was concerned about my injectors they called around and found my injectors but instead of just ordering them and putting them in the Called and told me they were too expensive that mine were still good to go. Most shops would have just put them in, And that is why I keep going back not just because of the quality of work but for the honesty.

My personal experience with ATE Performance Diesel was absolutely amazing! I needed an engine built for my peterbilt and had a lot of questions! Eli and his team team were very professional and were able to answer all my questions and guide my build in the combination and power range desired. They were able to meet the three week deadline to turn the truck around. They went well above and beyond my expectations. And they stand behind there work! The engine looks like a piece of artwork! The proof is in the numbers real numbers Dyno sheet run test custom tune numbers! The engine gets great mileage! The engine doesnt get hot on a hard pull! If you need a truck engine built or custom ecm tuning take it to ATE Performance! Hands down the BEST in the game.

One of the best in the business!!!

Eli is top notch. Had an engine swap done in my 2017 Kw 660 Cummins to cat. Wow he knows how to do it right. Brought my sons 2006 379 to him for a tune. Went from 3.5 up to a solid 5 mpg pulling a cattle pot and the power of both is unreal. Eli is my only mechanic I will go to. I came all the way from iowa. He is top notch Thanks again

This shop is one of the best around the Phoenix metro area. They have repaired 5 of my trucks and have always stood behind their work. I have nothing but good things to say about them. They are always there when I need them and have a very fast turnaround time on even major repairs. They have fair and honest pricing; there has never been an occasion where there was any surprise fees added on to my estimates. I would recommend this shop to anyone! Thank you for everything you have done for me!Sincerely your satisfied customer!

I came to get my truck tuned and got my services satisfied. They did tuning, were very professional about it. All the technicians, knew exactly what is wrong, and knew how to fix it. Very happy with outcome of my truck. Would recommend this shop to others. Top notch work!

I wish I could give this shop 10 stars. They did an awesome job rebuilding my c15 Acert engine. Went from twin turbos to single and tuned. Now it runs like a wild animal. Used to get 5mpg now I get 7+. Clean shop, Elias knows what he’s doing. Very smart and can do it all.

This shop did work for me on my Pete, they were quick and did an excellent job. Clean shop, and tools. Pricing is better than most around town. Overall I recommend you give this shop a try it wont leave you disappointed.

Knowledgeable and serious. Shop is kept clean and tools at their place. Work done comes with warranty (they are serious about it and not like other places that blame something else). I rebuilt my engine, rebuilt my transmission and they manufactured me a custom drive line. All is good 3 months later.

You will not be disappointed with this shop! Eli went above and beyond my expectations. He really took care of my truck, got me in right away and is extremely knowledgeable. I wouldnt trust my truck with anyone else!

The best shop for tuning and performance. I know if i take my engine work its done. I would recommend this shop to anyone that needs performance My truck got upgrade and fuel milage when from 6.5 to high 7 plus. I love my truck the way its performing after all the upgrades done. Thank you for all your help

Very friendly staff and helpful,If you are looking for performance and fuel economy this is the SHOP to come to .My 389 Pete was giving me from a 4.8 NOW7.2,7.4 .Highly recommend ATE PERFORMANCE inPhoenix AZ.

I have had mechanical work done with Elias for over 15 years. I have always had CAT motors. Nobody compares to his work on CAT engines. A year and a half ago I bought my first Cummings motor there were a couple glitches and as I was about to give up Elias figured it out. This guy thinks outside the box. I have sent dozens of people to him so he can fix other mechanics errors. Elias does phenomenal programming and my truck finally runs as it should !!!Keith BradleyKeith Bradley Truckkng Co Inc

All around great people with the highest of quality work very happy with my experience!!!!!

We had a new motor job on our truck done over in Joplin, Missouri and they messed it up bad and wouldnt fix it. Ate performance fixed the engine on our truck and they were great. Ive never heard such a smooth sounding engine. Well never bring this truck anywhere else to fix anything on the engine except for Ate performance.

The best shop I ever seen in my life They are the best professionals I spent over $3000 at the freightliner Dealership and they couldnt get my truck working I came to ATE performance Diesel whit in 5 minutes Figured it out what was wrong with my truck Best people to work with

Awesome service.. Thanks Eli😁✌

I found this place from Google.....i must say great customer service....and expertise....i would recommend any driver to bring their rig here....satisfaction guaranteed

Did a re-power from Paccar to Cat in a 2013 Peterbilt. 75,000 miles with no issues. GREAT motor, big power, and looks amazing. I wish I had done it sooner.

ETA performance its a good mechanic shop. This shop is not for everybody. They only deal with engine tuning and custom engines .

He knows enough about engine and does a good job Im happy with the work he did on my 2009 frightliner.

This shop terrible they want to charge you 8 grand for work that they caught me at the dealership to thousand dollar. Do your research before you go over there

Great job from the crew here at ATE. I will recommend anyone to bring their big trucks here.

Took my truck to get it checked it was making a noice on the front of my engine this guy knew what it was by just the sound and then i told him i wanted more power and he did a good job on tunning my engine this guy doesnt mess around good mechanic and a good computer tunner

Eli & his crew get it done!!

Eli Bustemante is the best diesel engine expert and ecm tuner in Arizona, can’t beat his professionalism, quality, and experience in mechanics and ecm tuning performance. He and his team will go above and beyond for your diesel engine needs. Personally my fiancé and l have known him for more then 15 years and would recommend him to anyone looking for an exceptional mechanic and expert ecm tuner. We bring all our semi trucks to ATE. I wouldn’t trust any other mechanic with my BIG RIGS! If your looking for a reliable, trust worthy, honest, knowledgeable, professional diesel performance expert in Arizona Eli and his team at ATE Performance Diesel is the place to go!

ATE Performance Diesel is the best place to do the ECM tuning!Elias is a beast when it comes to knowledge on CAT, Cummins, Detroit Diesel engines! Tunes that he does ROCK! I have had zero problems, and Ive tuned more than a dozen trucks from my fleet!CAT C15 SDP, Cummins ISX CM871 & CM2250, Detroit Diesel DD15 & Series60 - they all work flawless!Best spent dollars EVER!THANKS ELI! LOVE YOUR WORK MAN!

Best tuners for 515 Detroit and Cummins . One satisfied customers

Best all round tuner yet And mechanic in the industry