I just had a Jasper 6.7 Powerstroke replaced in my truck. While they were in there we decided to update the fuel system and install an industrial injection XR1 turbo. These guys sorted though it all in time for me to take the truck on a road trip from Tn to Kansas. I didn’t have one issue with this truck and the work they did. The power is amazing with the turbo and the tune and fuel economy is higher than I’ve ever seen. I can’t sing praises high enough for Tommy and his team!

These guys are great! Had my powerstroke in for a complete fuel system replacement last week. Waited a while for parts, but couldnt be happier with their repairs! Awesome techs! Truck runs better than it did new. Id recommend this place to anyone looking for performance diesel work!

Great place great techs. Did a rush job to get us back on the road as we were traveling. Price was right on normal no higher price for the out of state people. Highly recommend them.

Called the 13th to get a quote, gave my name number and the truck specs never got a call back. Then i called them the 17th, 6 times guy tried to tell me my truck didnt exsist. I have a 1st gen cummins (1990 d350 cummins turbo diesel) its a 12v. Everyone else at speedco, valvoline, firestone new exactly what my truck is execpt these people who specialize in dodge cummins trucks. Was told the 17th id get texted so i can send pics of the truck. No text. 18th called back and they finally texted me so i sent pics of the truck, then was told id get a call back. Obviously, no call back, so i waited a couple of days ya know maybe theyll startt working up a quote but no. Called yesterday again told i was going to recieve a call. No call. Called again today, no call back. DONT WASTE YOUR TIME.

These guys are absolutely top notch I run a hotshot business interstate with a 14 ram 3500 Im from Massachusetts and called them up was in the next day had been to multiple places including 2 ram dealers noone could figure out the issue and they finally came through 3 weeks of breakdowns and they had me sorted in a couple days would recommend to anyone. Honest no extra charges and upfront.Thanks integrity diesel performance-sean hoganService: Che

I am a repeat customer of IDP I went in with my truck told them what I wanted and my goals and worked with me on getting the job done in a timely manner.I had a tune, exhaust, dual south bend clutch and other small things accomplished. They have also helped with diagnosing an issue with the transmission. Will be returning with any other issues that arise with my Ram.

Called multiple times trying to get a quote for some services I needed. I was told that I would be called back in an hour with my quote. Next day I still have not received a call. I call back again and they tell me they are working on the quote and I will be called back in an hour. Again, never was called back. I eventually settled on buying the parts myself and installing them.

Solid mechanics down there at tegridy diesel. They communicate effectively through the entire process.I had My 6.0 bulletproofed with heads, intake, turbo, injectors, exhaust, regulated return fuel system, trans mods, converter, and a few misc. Odds and ends. Attention to detail is there and again communication was great. I highly suggest having Aaron work on your rig.

Brought my 2013 LML duramax in for a post purchase inspection and they helped me fix the lack of power the truck was having from a clogged fuel filter. They also informed me on an issue known with the injection pump and how when it goes out it takes the whole fuel system with it. This was about 6 months ago and I recently brought my truck back to them because my truck stopped working. They informed me that my injection pump went out because there was metal shavings coming the pump. Luckily I was informed 6 months ago of this problem and the $200 I spent 6 months ago for this disaster prevention kit saved me $8000 in repair costs for a whole new system. The guys down at Integrity Diesel performance have incredible knowledge of diesel trucks and will be my go to shop that i refer anyone to about diesel questions. Thanks again guys!

These guys and gals were fantastic with answering the many probably annoying questions I had. They were polite professional and very assuring to me they knew exactly what they were doing and they didn’t disappoint. My truck runs way beyond any expectations i had. They will forever be my Diesel shop and can’t wait to do some more upgrades. Thanks again Integrity.

I recommend them to anyone that needs repair I had them put head studs and gasket on and hook up my guages they did in a timely manner and well worth every penny thank you Integrity for fixing my truck if I could give 10 stars I would

Very Informative and a Huge help. I am new to Diesels and needed advice on what i needed for my truck. I was helped without pressure and was provided the information I needed to make an informed decision on what I want to do for my vehicle. Thank you for all your help.

I always use Integrity for my auto repairs. They are very helpful reliable and honest. They are the only place I take my vehicles. They have the best prices in town and they have a quick turn-around on getting your vehicle back to you in a timely manner.

They did an amazing job with my truck. Just wish I could get my old parts back or have a different price for core charge

Perfect place for all your deisel and automotive performance needs and upgrades!

Spent 4K on a coolant leak, FICM replacement, driveshaft replacement, diagnosing check engine light (which was a complete waste of diagnosing fee) and oil change (over filled and didn’t replace filters, had to correct myself) .When I brought the truck back because of the same leak the owners son told me “well we’re not perfect and we spent over an hour looking for the leak”.I should’ve shopped around but I went off of reviews and opinion from a friend but I do not personally recommend them due to 4,000.00$ of imperfection.I am sure some folks have had great service from Integrity and maybe I just got the mechanic that wasn’t worth a damn but again not worth the risk especially when owners son doesn’t own up to his shops mistakes.

Brought a 20 year old Dodge 2500 diesel back to life. They were honest, did what they said they would do, I got what I paid for. Really appreciated their honesty. Basically I am really happy with their work.

Terrible, wont go back

Not sure where to take your vehicle? Look no further Tommy and his guys are outstanding and friendly group of guys. Only people I trust in the area to touch my truck, very knowledgeable and competitive pricing. Will continue business with them for as long as I’m in Clarksville 10/10 would recommend.

Best place in Clarksville to take you diesel

Not only was the owner rude and inpatient on the phone, but they also recommended 2 different fixes costing over $1,100 that ultimately did nothing to improve our trucks performance. We brought in our F250 b/c it was losing power on idle and generally running oddly. They said it needed the FICM replaced. My husband verified that fuel injectors were tested and we were assured the injectors were noth the issue. Replaced FICM, ordered wrong harness, but said should be running better. Was running worse. We were $600 in at this point. Now suddenly an injector needs replaced. Another $500 We left them the truck for a week, heard nothing about anything else needing to be done and when we picked up the truck it still had loss of power and now blowing white smoke from exhaust and not driveable. The owner was again rude and just sort of like I dunno, maybe its the harness afterall. There are no words to describe how irritating this man is and how poorly he deals with things when HE makes the wrong calls. I would hate to work for such an dishonest, rude man and could see that the mechanics didnt agree with him either. He offered no compensation so karma is all I can hope for.

This is THE PLACE to get your diesel worked on!!!!