Darkside Diesel LLC

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Darkside Diesel LLC Cummins diesel performance specialists helping you improve power, towing, and economy.

2017 Ram got a Muldoon’s Performance Transmissions 🔧🔩⚙ 68RFE sauce boss valve body upgrade and tuning to get 225psi of l...
10/06/2026

2017 Ram got a Muldoon’s Performance Transmissions 🔧🔩⚙ 68RFE sauce boss valve body upgrade and tuning to get 225psi of line pressure! This thing is ready to rock. Saving one 68RFE at a time.

10/03/2026

72 Fast was a blast! Can't explain how happy I am with taking second. We came to NHRDA world finals for Lavon D. Miller 72 Fast. We went round after round through the field of competitors. Made it to the finals. Went up against Matt. Short shifted the truck into 2nd and snuffed the charger. Be back next year ready to roll. Thanks to my family for flying out to support me and Greg my mechanic for coming with to line me up every round at the light and put me in the water box. Shout out to Don and April for getting my Don and April Morrison injectors ready in time. Truck has been the fastest ever! Manual shifting and on leaf springs. Let's get to the grind and get it next year! Truck is built all in house from the engine, transmission, and tuning. Rocking the Muldoon’s Performance Transmissions 🔧🔩⚙ FMVB valve body!

Getting dialed for 72 Fast in Texas. We made the switch to Flux Diesel injectors and they did not disappoint! We made 13...
09/19/2026

Getting dialed for 72 Fast in Texas. We made the switch to Flux Diesel injectors and they did not disappoint! We made 1309Hp and 2289ft-lbs of torque. Truck runs so much cleaner and spools way faster. Dyno graph reads smooth all the way across. Working with April and Don the owners of Don and April Morrison was amazing. We passed ideas and data back all morning. Team work makes the dream work. Hands down the best customer service I have ever had from a fuel shop. Thanks you guys for all you did. Shout out to Jake Jake Joe Rodriguez for letting me use his dyno and time. We made a lot of runs today. I time is precious so thank you so much.

08/07/2026

68RFE Life Saver. The first upgrade you should do!

07/04/2026

Happy 4th Of July! God Bless America!

07/02/2026

Everything you want in a 5.9 Cummins
Darkside Diesel 550hp 48RE
Darkside Diesel Custom Tunes
S&S Injectors, Cp3
D&J Precision Machine Heavy Hauler
Fenley 63mm HE351
Steed Speed
Bullet Proof Diesel Billet water pump
Fass 165
Banks charge air cooler, pipes, intake horn, and air filter
Mishimoto Transmission cooler
Fleece thermostat bypass
Edge CTS3

We are hiring! We are looking for a full-time light-duty Cummins technician. Please send inquires/resumes to darksidedie...
06/25/2026

We are hiring! We are looking for a full-time light-duty Cummins technician. Please send inquires/resumes to [email protected] attn: Spencer.

Fresh D&J Precision machine 6.7 Cummins. Starting the truck with a new life. Fresh injectors and Valair clutch. This tru...
06/24/2026

Fresh D&J Precision machine 6.7 Cummins. Starting the truck with a new life. Fresh injectors and Valair clutch. This truck is ready to get put to work.

Taking that win against the guy that callled me out. Nice taking home some extra cash.
06/06/2026

Taking that win against the guy that callled me out. Nice taking home some extra cash.

05/31/2026

Progress on our 72 Fast Class Build. Test and test. Learning so much on suspension. The race can be won in the first 60 feet of the track. Everyone better be ready because this truck is dialed in.

Address

108 4th Street
Wilder, ID
83676

Opening Hours

Monday 8am - 6pm
Tuesday 8am - 6pm
Wednesday 8am - 5:30am
Thursday 8am - 6pm
Friday 8am - 6pm

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