Triple-Turbo 6.7L Cummins Engine - Engine Builder Magazine

Triple-Turbo 6.7L Cummins Engine

The former ATS Diesel race truck is now owned by Justin Lyons of RG Diesel, complete with an engine rebuild and ready to debut next month at the Thoroughbred Diesel Throwdown. Check it out!

Diesel of the Week is presented by

*Article sent in by Meghan Lyons*

Louisiana native Justin Lyons has been around motorsports since he was young. He moved to Tennessee with his wife Meghan and their son in 2016.  After their second son was born in 2018, they decided to start their own diesel shop in Greeneville, TN.

RG Diesel ( was started in 2019 and has grown leaps and bounds since it first opened its doors. Meghan, a former registered nurse, manages the office and customer flow, while Justin keeps things moving in the shop. The facility houses three bays, and they have two full-time diesel technicians. However, don’t let the size of the shop fool you! The team at RG Diesel turns out a steady flow of work ranging from mechanical repair and performance upgrades to complete engine builds.

After traveling to races and shows for business, the itch returned to compete in racing again. While attending ATS Dealer Days training in 2021, the former ATS race truck – a 2006 Ram – caught Justin’s eye. In its ATS days, it was run in the Diesel Power Challenge, Northwest Dyno Circuit and multiple dyno and drag racing events. The truck had since been sitting for quite some time, but it soon made its way to Greeneville, TN with RG Diesel as the new owners.

Part of the resurrection included a fresh engine rebuild. The original sleeved, deck-plated block has Wagler 1” longer rods, held together by a Gorilla girdle and ARP fasteners. The head was upgraded to a Fleece Stage 2 race head, Wagler 1” longer head studs and pushrods. Harland Sharp roller rockers were modified to fit the common rail 24v. It has a ZZ Fabrication intake plenum accompanied by a Frozen Boost custom water-to-air intercooler, and is fueled by two FASS 220 fuel systems, ATS dual fuelers, and DDP 300% injectors. 

A highlight of the truck are the triple turbos, which include two low pressure ATS Aurora 6500 83mm turbos blowing into a 7500 series 96mm turbo. The engine is backed by an ATS 4R100 race transmission and conversion kit. The build is brought all together by custom tuning from PPEI.

None of this build would be possible without hours of hard work and the relationships built within the diesel industry.  We want to give a huge shout out to ATS Diesel, Thoroughbred Diesel/Driven Wearhouse Distributors, Fleece Performance, Wagler Competition Products, PPEI and Dynomite Diesel Products. All machine work was done by Performance Automotive, custom hoses by Greeneville Hose & Supply, custom paint by W&R Paint Supply and last minute finishes from our local Advance Auto Parts.

We plan to make the refreshed trucks debut at Thoroughbred Diesel Throwdown on May 20, 2023. Our goal is for it to make 1,200 horsepower on fuel only and to keep the engine healthy! We will continue 2023 with local dyno and drag racing events in the 6.70 index class, with plans to continue next year in the ODSS circuit 5.90 index class.

Diesel of the Week is sponsored by AMSOIL. If you have an engine you’d like to highlight in this series, please email Engine Builder Editor Greg Jones at [email protected].

You May Also Like

Turbocharged 5.9L Common Rail Cummins Engine in a 1947 Ford

After sitting in his father-in-law’s backyard for a number of years, this 1947 Ford was gifted to Chase Wells’ wife. Chase owns 1 Way Diesel Performance and knew someday he’d bring the truck back to life. He did so using a 5.9L common rail Cummins engine on a special episode of Texas Metal’s Loud and Lifted. Check out the result.

There’s a lot of viral diesel content out there on the internet showcasing unique diesel builds, but how many can say they’ve built up a business that is constantly being featured on network television? Chase Wells, owner of 1 Way Diesel Performance, is one of those guys who is humble at heart, but could brag all day if he wanted to.

1,000-HP Capable 6.7L Powerstroke Engine

Nick Stoner, a customer of Kill Devil Diesel, recently got his fully built 6.7L Powerstroke engine – a build Nick wanted to be capable of 1,000 horsepower. However, Nick is no longer building the truck the engine was going into, so this badass diesel engine is for sale. Check it out.

6.7L Powerstroke engine
Turbocharged 6.7L Second Gen Cummins Engine

Thanks to attending a truck pull event at an early age, Sean Purdy can’t shake his passion for diesel trucks and engines. He recently completed a fresh build on his 1999 Ram 2500 with a turbocharged 6.7L Cummins second gen-swapped engine.

6.7L Cummins engine
Turbocharged 5.9L Cummins Engine

As an industrial millwright, Devan Leeds has a lot of knowledge and skills with his hands. He’s also a thrill seeker when it comes to high-speed vehicles. Case in point, his ’03 Ram 2500, which features a rowdy, turbocharged 5.9L Cummins engine under the hood. Check it out!

Leeds Fabrication 5.9L Cummins
Compound-Turbo 6.0L Powerstroke Engine

Steve Burton of New Performance Automotive and Chris Moore of Flatwoods Diesel Performance recently teamed up to build this compound-turbo 6.0L Powerstroke engine. Check it out!

Other Posts

Wagler’s New Billet Duramax for Drag-and-Drive

Jeremy Wagler and his team at Wagler Competition Products have become well-known for their diesel work, and specifically the shop’s enhancements for Duramax engines. Well, Jeremy and his team have taken another step forward by introducing an all-billet Duramax geared for drag-and-drive competition. We caught up with Jeremy at PRI 2023 to get the full

Hot Shot’s Secret Stiction Eliminator

Hot Shot’s Secret Stiction Eliminator is engineered to remove stiction, the sludge and varnish created from burnt oil, while also lubricating.

A Different Dyno Design

The dyno is a valuable tool, so it’s nice when an engine builder feels confident in the setup of it. Enter the shipping container engine dyno design.

AMSOIL Signature Series 0W-16 100% Synthetic Motor Oil 

AMSOIL Signature Series 0W-16 100% Synthetic Motor Oil provides next-level engine protection primarily for those with Toyota and Honda applications calling for a 0W-16 viscosity.