Add-a-Turbo Kit for 6.7L Cummins | Dodge Towing Compound Turbos
Fits 2007.5–2018 Dodge 6.7L Cummins
*Retains EGR and Exhaust Brake if desired*
The Diesel Power Source Add-a-Turbo Kit is the ideal towing twin turbo upgrade for 6.7L Cummins owners from 2007.5–2018. Designed to work with your factory HE351VE turbocharger, this kit adds an S475 for serious gains in torque, EGT control, and horsepower—all while maintaining exhaust brake functionality.
Key Performance Benefits:
- Spools like stock while significantly improving airflow (up to 2.5x)
- Reduces EGTs by 250–400°F
- Retains stock turbo and exhaust brake
- Horsepower increase: 23% | Torque increase: 24%
- Supports up to 650 HP (700 HP with S480 upgrade)
- Improves mileage by up to +1 MPG
Why Choose DPS Add-a-Turbo?
- Direct bolt-on installation – no fabrication required
- Stainless steel TIG-welded exhaust tubing
- OEM look – retains factory air box
- High-flow air filter and 2-piece 4” downpipe included
- Uses stock HE351VE turbo as high-pressure stage
- Upgradable to S480 turbo (for builds up to 700 HP)
Included in the Kit:
- S475 Borg Warner turbo (75mm compressor / 96mm turbine / 1.32 A/R)
- Air filter & intake tubing
- Hot pipe and low-pressure charge pipe
- 2-piece downpipe
- Stainless exhaust tubing
- Support bracket for S400 turbo
- Steel braided high-temp oil supply lines
- Water line, flex oil drain line, and fittings
- Gaskets, clamps, bolts, nuts, and hardware
- Heat shield and heat wrap
- Coolant tank (select models)
- Complete installation instructions
How It Works:
- Dual compressors work together in their most efficient ranges, creating cooler, denser boost air
- Boost pressure and exhaust drive pressure approach a 1:1 ratio
- Improves combustion and reduces in-cylinder heat
- Additional air molecules act as heat sinks—similar to jet engine thermodynamics
Technical Notes:
- Kit is capable of over 70 PSI boost
- Head studs recommended for 45+ PSI; fire rings recommended for 55+ PSI
- EGR and DPF systems can remain physically intact, but most trucks will require prior emissions delete and tuning
- Diesel Power Source does not sell or support emissions delete components
With a 500 HP build, you can expect an additional 120–125 HP. Designed for power, towing performance, and street-friendly drivability, this Add-a-Turbo kit is the cleanest, most OEM-like compound upgrade for your 6.7 Cummins.
