Duncan Diesel Power

10/09/2026

Come on out to the Thunder in Tornado Alley Tractor Pull tonight and tomorrow! Gates open at 5:00 sharp! Stop by the booth say hello and ask us all your truck questions!

10/05/2026

Meet the crew at the booth this Friday and Saturday we will have all kinds of merch and parts on display!

09/14/2026

Once again Duncan Diesel Power will be putting on a open street class at the Thunder in Tornado Alley Tractor Pull Saturday October 10th come out, bring the family, and if you’re brave enough, make a hook! Open class entry is $50 with a guaranteed $1,000 to first place! Come on out and have some fun!

09/03/2026

We have been super busy recently keeping our amazing customers on the road! One of them even hit 1,000,000 miles on his 2020 super duty!

We’ve been doing diesel the right way since 2017 and we’re nowhere near done!

07/02/2026

Have a great weekend!!!

06/17/2026

We currently are caught up and have zero wait time! Call us today to get your truck pulled in immediately!

Engines ✅
Transmissions ✅
Transfer cases ✅
Gear and axle ✅
Electrical ✅
Suspension ✅
Heating and air conditioning ✅
Brakes ✅
Tool boxes ✅
Bumpers ✅
Performance upgrades ✅

And more!

06/02/2026

As close to “bulletproof” as you can make a 5th gen Cummins engine!

Fleece Performance Engineering coolant bypass and grid heater relocate kits

Valair Clutches billet flex plate

Hamilton cams flat tappet conversion

Power Stroke Products head studs

And a complete bottom end reseal with genuine Cummins parts!

Give us a call if you’re ready to make your 19-24 Cummins not suck!

05/20/2026

Some more Fleece Performance Engineering goodness going in today!

05/12/2026

We have our first order placed we will be keeping these kits in stock!

NOW AVAILABLE! Fleece Performance intake horn and grid heater kit for the 6.7L Cummins!! From the #1 trusted name in diesel performance comes the most complete kit available to address the OEM grid heater nut nightmare. The direct replacement intake horn and high-flow intake plate increase overall engine airflow and replace the OEM style grid heater with a robust coil heating element. Protect your investment with confidence with the latest from Fleece Performance.

Features:
*Eliminates the risk of engine damage from the OE style grid heater nut failure.
*Improves throttle response and airflow with lower intake restriction.
*Allows for reuse of the OE high pressure fuel lines and direct replacement options – no proprietary fuel line problems to worry about.
*The most complete kit on the market - includes all necessary hardware and gaskets.
*High flow 700W coil heater along with a new high flex heater cable and new grounding cable.
*Factory appearance with the highest-level fit and finish.
*Precision machined, cast aluminum high flow intake horn and plate.
*1/8” NPT port for sensor installation.
*Optional, secondary heater for cold weather start-ability down to -35 degrees Celsius.

04/28/2026

Cabs goin up on a Monday!

Call today to get your ride in tip-top shape!