I Can Attest!!!

I bought a module for my 2026 F-350 Platinum Plus, my 6th PowerStroke in 30 years. In the past, I deleted and tuned my trucks, but I didn't want to risk it on the new one. With 13.5mpg (no load). With $200+ fill-ups, I ordered Allan's module. It was simple to install - just had to move a small section of my intercooler pipe. After installing, I ran up to Knoxville and was getting 17.5mpg at 70-75 MGH! I just installed a module on my friend's 2022 King Ranch. He drives 100 to his office a few times a week. He said he was up to 21mpg on the drive home. Allan is not kidding about being available. I had a question about heavy towing and he responded personally with the info i needed. It works great towing my 24000lb 5-th wheel. If you're thinking about getting one Just do it. With fuel prices today it wont take long to pay for itself. Highly recommended. I bought a module for my 2026 F-350 Platinum Plus, my 6th PowerStroke in 30 years. In the past, I... I bought a module for my 2026 F-350 Platinum Plus, my 6th PowerStroke in 30 years. In the past, I deleted and tuned my trucks, but I didn't want to risk it on the new one. With 13.5mpg (no load). With $200+ fill-ups, I ordered Allan's module. It was simple to install - just had to move a small section of my intercooler pipe. After installing, I ran up to Knoxville and was getting 17.5mpg at 70-75 MGH! I just installed a module on my friend's 2022 King Ranch. He drives 100 to his office a few times a week. He said he was up to 21mpg on the drive home. Allan is not kidding about being available. I had a question about heavy towing and he responded personally with the info i needed. It works great towing my 24000lb 5-th wheel. If you're thinking about getting one Just do it. With fuel prices today it wont take long to pay for itself. Highly recommended. View more

No Footprint?

I don't normally write reviews, but i thought this is important so here it is. I got a module for my 2025 Ram 6.7 Cummins. Great HP and mileage. About a month later I had to take it in the the dealership for warranty work. I was a little nervous but I was assured that if I took the module off before going in, that there would be no problem. Will I have to say they were right. I wasn't asked any questions by the service dept at all. Got my truck home and reinstalled my module. I highly recommend this product if you still have warranty left. I don't normally write reviews, but i thought this is important so here it is. I got a module for... I don't normally write reviews, but i thought this is important so here it is. I got a module for my 2025 Ram 6.7 Cummins. Great HP and mileage. About a month later I had to take it in the the dealership for warranty work. I was a little nervous but I was assured that if I took the module off before going in, that there would be no problem. Will I have to say they were right. I wasn't asked any questions by the service dept at all. Got my truck home and reinstalled my module. I highly recommend this product if you still have warranty left. View more

Honest review

After speaking with the owner, Mr Shepard, I bought a performance module for my 2023 F-350. The wife and I are full-time RV'ers and pull a Forest River Wildcat that weighs around 16000 lbs. The installation was quick and easy, as he told me. I am so glad I made this investment. The engine performance is so much better. The turbo definitely spools up faster, and my uphill speed has increased about 8 miles an hr. I was hoping for a little more mileage, but I'll gladly take the 2.6MPG improvement we got. After speaking with the owner, Mr Shepard, I bought a performance module for my 2023 F-350. The wife and I... After speaking with the owner, Mr Shepard, I bought a performance module for my 2023 F-350. The wife and I are full-time RV'ers and pull a Forest River Wildcat that weighs around 16000 lbs. The installation was quick and easy, as he told me. I am so glad I made this investment. The engine performance is so much better. The turbo definitely spools up faster, and my uphill speed has increased about 8 miles an hr. I was hoping for a little more mileage, but I'll gladly take the 2.6MPG improvement we got. View more

Hotshot Driver

I deliver RV's with my 2025 Ram. I heard from another driver about dieselmodules.com. He gave me the owners number so a called him. I have to say, it's the best decision i ever made for my truck. I'm saving about $50 a day in fuel costs right now (4-18-26) I deliver RV's with my 2025 Ram. I heard from another driver about dieselmodules.com. He gave me the owners number... I deliver RV's with my 2025 Ram. I heard from another driver about dieselmodules.com. He gave me the owners number so a called him. I have to say, it's the best decision i ever made for my truck. I'm saving about $50 a day in fuel costs right now (4-18-26) View more

Impressive

I purchased a performance module for my 3L EcoDiesel. While I was a little skeptical at first, the owner, Allan assured me that he would refund my money if I was not completely satisfied. Well, I have to say I am very impressed with the improved low end horsepower. Not only that, I’m up 3 miles a gallon, making it a great investment. In fact, I am so impressed with the module’s performance, I bought another for my brother for his 5.9L Cummins. Thank you for a great product. I purchased a performance module for my 3L EcoDiesel. While I was a little skeptical at first, the owner, Allan... I purchased a performance module for my 3L EcoDiesel. While I was a little skeptical at first, the owner, Allan assured me that he would refund my money if I was not completely satisfied. Well, I have to say I am very impressed with the improved low end horsepower. Not only that, I’m up 3 miles a gallon, making it a great investment. In fact, I am so impressed with the module’s performance, I bought another for my brother for his 5.9L Cummins. Thank you for a great product. View more

This thing works!

Bought a performance module for my Mercedes Sprinter. Drove from Washington State to Baja Mexico. the Performance was outstanding and picked up 2.3 MPG. Oh, and great Tech support on the install. Once I found the connector, it was just minutes to finish as advertised. Thanks again. Bought a performance module for my Mercedes Sprinter. Drove from Washington State to Baja Mexico. the Performance was outstanding and... Bought a performance module for my Mercedes Sprinter. Drove from Washington State to Baja Mexico. the Performance was outstanding and picked up 2.3 MPG. Oh, and great Tech support on the install. Once I found the connector, it was just minutes to finish as advertised. Thanks again. View more

Best Performance

I was getting 20-22 MPG empty and 10-12 MPG pulling a 40 Ft 5th wheel in my 2008 Duramax with the module. I sold it and bought a 2015 Chevy 3500 about a year and half ago, and was not pleased with the sluggish power. That’s why I ordered another performance module, because I know it will increase my fuel mileage and towing power in that important driving zone I was getting 20-22 MPG empty and 10-12 MPG pulling a 40 Ft 5th wheel in my 2008 Duramax with... I was getting 20-22 MPG empty and 10-12 MPG pulling a 40 Ft 5th wheel in my 2008 Duramax with the module. I sold it and bought a 2015 Chevy 3500 about a year and half ago, and was not pleased with the sluggish power. That’s why I ordered another performance module, because I know it will increase my fuel mileage and towing power in that important driving zone View more

Unbelievable

I purchased the module for my 2010 Revolution LE 42T early Jun 2023, prior to our vacation trip to Julian, CA., from Southern NV. I have a 400 Turbo Cummins in our coach. We noticed a significant increase in power. I maintain 55-60MPH up hills without putting my foot in it and that was really nice. We took SR 79 towards Warner Springs, which is pretty windy and very hilly. The performance was very good. Pedal response to power was excellent. The climb up from Santa Ysabel was surprising. To accelerate to 50 and climbing that, I had to lay off the pedal pressure. I haven’t seen a mpg increase yet. BTW, besides my coach, I had my custom tow dolly with my buggy and my Toyota 4X4 in tow. I purchased the module for my 2010 Revolution LE 42T early Jun 2023, prior to our vacation trip to Julian,... I purchased the module for my 2010 Revolution LE 42T early Jun 2023, prior to our vacation trip to Julian, CA., from Southern NV. I have a 400 Turbo Cummins in our coach. We noticed a significant increase in power. I maintain 55-60MPH up hills without putting my foot in it and that was really nice. We took SR 79 towards Warner Springs, which is pretty windy and very hilly. The performance was very good. Pedal response to power was excellent. The climb up from Santa Ysabel was surprising. To accelerate to 50 and climbing that, I had to lay off the pedal pressure. I haven’t seen a mpg increase yet. BTW, besides my coach, I had my custom tow dolly with my buggy and my Toyota 4X4 in tow. View more

Big difference

I have a 2025 f-250 and a friend told me about dieselmodules.com. He has a 2024. I got a perf module in Jan. 2026. I installed it myself in less than 20 min. I am very happy with the extra 75HP pulling power and mileage. Picked up 3 mpg. I have a 2025 f-250 and a friend told me about dieselmodules.com. He has a 2024. I got a perf... I have a 2025 f-250 and a friend told me about dieselmodules.com. He has a 2024. I got a perf module in Jan. 2026. I installed it myself in less than 20 min. I am very happy with the extra 75HP pulling power and mileage. Picked up 3 mpg. View more

Wow!

Wow. I can’t even explain the difference the diesel module has made on my 2023 1 ton GMC Duramax. The extra 93HP and 200+ ft. lbs. of torque is impressive, but what really gets me is I'm up 2.8 MPG on average. Amazing product.  I’m recommending it to everyone I know. Wow. I can’t even explain the difference the diesel module has made on my 2023 1 ton GMC Duramax. The... Wow. I can’t even explain the difference the diesel module has made on my 2023 1 ton GMC Duramax. The extra 93HP and 200+ ft. lbs. of torque is impressive, but what really gets me is I'm up 2.8 MPG on average. Amazing product.  I’m recommending it to everyone I know. View more