I’ve purchased one of their stealth 64mm turbos for my lbz about 6 months ago. I called them to get help through the buying process to figure out what I need. Very helpful and very educational people. Even after buying I sometimes call them to get answers for other questions about my truck. They sell high quality parts and will educate you on everything they recommend. I can’t recommend them enough.

2016 Cummins Ram 3500, Dually. I spent 2 years following this product before purchase.Kit was expensive, but solid. Easy to install, east to use, very easy communications with sales and techs. Truck performs like a dream, tows like a beast. Shifting improved, power delivery is near instant now.

Called them after I received a quote from Kunes Woodstock. Kunes diagnosed my truck as having a turbo fail. Almost 8k repair quote. Only 70k on truck and all maint done properly and on time. Went for 2nd opinion with Chris and DJ and they found the aftermarket NoX sensors i used had an issue. They swapped both out to Mopar and cleared all the codes and she runs perfect with no check lights. Thanks much guys and ill be back in the future for a power upgrade.Thanks !

Great products, great service and one of the best customer service teams in the business.

Absolute pleasure to deal with! From their EFI live tuning all the way to getting me set up with new injectors and CP3 pump. Chris Ehmke is a gentleman and took the time to make sure everything was right and point out other items to replace while doing injectors to extend the life of my truck. He made the ordering process easy and provided great information when I had any questions. I will keep using these guys for any of my diesel needs, thanks again!

A few months back we bought the tune for 2019 ram 3500 just for a little extra pulling power customer service was great but have had nothing but problems with the tune our exhaust brake on all the tunes does not work over 57 miles an hour and on their regular tunes the transmission shifts very very hard and throws check engine light for 5th gear ratio incorrect. At this point in time us and their technicians have no idea what it could be so we are looking for a refund this has been a waste of $1500.

These guys absolutely know what they are doing with these trucks! Amazing customer service and products. Thanks Jim and James for all your help.

Needed a replacement turbo and decided to upgrade a few millimeters/horsepower. And I needed it in time for an upcoming road trip. I called beforehand and Calibrated Power had it ready when I got there. Same day service!

Great customer service, awesome service techs, knowledgeable to say the least, they walked me through my ECM and TCM install, im 600miles away in Toronto Canada, I ordered tuning for my 19, L5P everything went in without a hitch, Chris in sales (2121) helped me through the buying process he took care of me answered all my questions after talking to him I felt that he wasnt just a salesman trying to make a sale he actually cares about the customer very very rare these days, and on the service side Tim the tune man Mahoney as knowledgeable as they come when it comes to tunes, my truck feels like a brand new vehicle thanks to his tunes, 150 extra HP brings my 9500lbs dually to life, I highly recommend these guys, without a doubt the best in the business, I will be coming down for my trans in the near future, they have earned a customer for life, keep up the great work.

Should have told me that tune will not delete my egr before I bought the tune package.. now my truck goes into limp mode because the egr is throwing my maf sensor.. terrible company don’t wish this upon anyone.. should make sure you find a tuning company that will block egr or you will have problems

Awesome guys very helpful 👍👍👍👍

Great shop. Came in on time, below budget and even did more work than expected. Thank you so much Jim and Jeremy!!!

Great company, great people. Do not go anywhere else!

Very personable. Willing to spend lots of time on each customer to make sure they get exactly what they want. For reliable trust worthy performance this is the place.

Beware if you’re out of state!! We had an appointment to be there 3 days for tuning, they came recommended so we drove over 1000 miles. They didn’t communicate from the beginning when they had problems with their dino and tuning, we had to extend our stay and they just pushed the truck out late Friday afternoon with putting in a wrong model tune!!! Needless to say we ended up with a blown engine on way home!! Had to buy a new motor and never got a return call after contacting them with the evidence they did wrong!!

By far the most honest diesel shop around. Not only are all their products tested on their in house dyno, but they will consult with you to give you the best results out of your truck.

These guys do good work at a fair price and, oh yeah, they’re honest, ya know, like the dying breed type. I just got my LMM back, and it’s running better than ever. They did my up pipes, down pipe, and ds manifold. I’m gonna be back for more, no doubt. Thanks guys!

One of the best places to take your diesel. Great customer service and very knowledgeable. I travel from arizona just to go here.

Installed the switch on the fly LML system. Works great unbelievable difference from stock. The flashing and downloading worked just as described in the directions. No issues.

Calibrated power is one of the very few places i would ever take my truck to. Chris Ehmke is not just a sales man to make ur money and run he is one of the few that will be there after the sale when u need help. Bob Peterson helluva tuner daily drivability of his custom tunes are the best my truck has had. Good place, good people...just watch out for the cops in the school zone!

Ive had them do many things to my dmax express van over last few years, gotta say it runs Awsome and their a good place to deal with. I May have one of the fastest service vans around as a result their efforts!

I now have a truck that I would confidently with a combine weight of 26,000 lbs tow to any corner of this country.

Top notch company! Great to deal with Chris and joey are great!

Intelligent and professional group of guys!

They came highly recommended to my husband because of their expertise in diesel performance and could work on his Cummins. They had his truck for 12 weeks; yes... 12 weeks because they were waiting on the tunes. We both called numerous times inquiring about the hold up and the ETA. We thought we were being as understanding and patient as possible because all we wanted was the truck to perform correctly. My husband even told them that he was missing work after they had the truck past the 7th week. Their solution was to offer up one of the mechanics personal vehicles. We took him up on the offer and was set to get the vehicle but was then told that it was no longer available. They then informed him that they were busy working on their Challenge Performance truck, also a Cummins. After week 12 and thousands of dollars in lost wages, we had to pick up the truck. When we picked it up, it ran but not at the expectation that was promised. The fuel mileage is worse than when we took it in as they placed an economy tune in it. Please keep in mind, we live in a different state and only took it there because of the recommendation and their commitment to properly ensure that it run at its full potential. They told us that they would call us and keep in touch and updated when they got the correct programming for the tunes. It is 7 months later and we havent heard from them. Not even once. Again, we were understanding and probably more patient than most; remember... 12 weeks without the vehicle. We would have understood if they were forthright about lacking the capabilities to do the job; however, now we are just livid and cannot believe what we went through. Please, do not use this service especially if you have a custom built Cummins as they either will not make it a priority or just cant do what they say they will.

Very informative, great customer support, excellent product SPADE

The bestest

Great service.