A DPS compound setup pairs a smaller high-pressure turbo with a larger low-pressure turbo. The small turbo lights first for quick response. The large turbo supplies airflow as load rises. The result is smooth power across the entire RPM range with better temperature control on long grades and under heavy throttle.
What you get with DPS compound turbos
- Enhanced power and efficiency: Two-stage compression maximizes airflow, boosting horsepower and torque while lowering EGT and supporting fuel efficiency under load.
- Smooth power delivery: A wider boost map provides consistent performance across RPM, improving drivability for highway cruising, towing, and competition.
- Durability and reliability: Load is shared between two turbos, reducing stress compared to a single large charger. Components are built to handle heavy-duty use.
- Customizable performance: Multiple turbo sizes and housings allow you to tailor response and top-end power for street, towing, sled pulling, or race use.
- Great fit: Designed in 3D CAD with CNC-machined castings for excellent, OEM-like fitment that resists cracking and warping over time.
You’ll be impressed by your diesel truck’s response with a DPS Compound Turbo kit. If you want a dependable setup that controls heat and puts power to the ground, compounds are the proven path.
Why choose compound turbos for your diesel truck
- Fitment that works: DPS compound kits are engineered to package cleanly under the hood with cast and machined parts that align and seal properly.
- Power gains: Compound systems commonly add significant power over stock turbo setups, improving acceleration and towing capability.
- Improved efficiency: By improving the boost-to-drive-pressure ratio, compounds reduce pumping losses and support cleaner combustion, which can help emissions control and reduce EGT.
- Performance across RPM: Compounds reduce lag and maintain airflow at higher engine speeds, giving you reliable pull from low to high RPM.
- Longevity: With work split between two turbos, parts see less individual stress. DPS kits are built for long-term reliability.
- Flexible options: Choose turbo sizes to match your goal, from stock-fuel towing to high-fuel competition. Systems can be tailored for street, towing, sled-pulling, or race.
- Cooler EGT: Moving more air supports complete combustion and carries heat out efficiently. DPS compounds typically reduce EGT by 250–400°F, helping protect the engine so you can use your power.
- Maximize potential: Compounds are the most effective way to fully use the capability of a diesel engine while keeping temps in check.
How to choose your compound kit
- Towing and daily use: Pair an S475 atmospheric with a stock or stock-size high-pressure turbo for quick lighting and excellent grade control.
- Street performance: Step to an S480 or larger atmospheric charger for more airflow while keeping a responsive secondary for drivability.
- High-fuel builds: Larger atmospheric options and freer turbine housings add top-end flow. Expect later spool; consider gearing and converter.
- Elevation matters: At higher altitude, slightly smaller atmospheric sizing often improves response. Ask DPS for a recommendation.
Fitment and installation
Kits are available for popular 5.9L and 6.7L Cummins applications. Verify year-specific parts, flange styles, intercooler piping, downpipe, and oil feed/return requirements on each product page. Experienced DIYers can install with the right tools and time; professional installation is recommended if you are new to compound plumbing.
Recommended supporting parts
- Quality exhaust manifold matched to your turbo flange
- High-temp charge-air boots and constant-tension clamps
- Boost and EGT gauges for towing and performance use
- Appropriate fueling and calibration for bigger injectors or pumps
Building in stages? Explore related categories: Add-A-Turbo Kits, S300 Single Turbos, S400 Single Turbos, 6.7 Cummins Exhaust Manifolds.
Frequently asked questions
How much can compounds lower EGT
Many customers see 250–400°F lower EGT with a properly sized and installed compound kit, especially under sustained load.
Are compounds practical for daily driving
Yes. With the right sizing, compounds deliver quick response, steady boost, and cooler temps for towing and everyday use.
Do I need tuning
Some trucks run acceptably on stock calibration, but many benefit from updated tuning to optimize fueling, vane/wastegate control, and shift strategy.
Single big turbo or compound setup
A large single can make power but often trades low-speed response. Compounds add low-end spool and thermal control while keeping high-rpm airflow.
Can I install at home
Experienced DIY owners can install with quality tools. If you are new to routing oil lines, clocking turbos, and aligning charge-air plumbing, consider professional installation.
