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Compound Kits
Compound Turbo Systems
Diesel Power Source Compound Turbo Kits combine two turbos for a balanced mix of spool and airflow. Ideal for towing, racing, and heavy hauling, our systems are engineered for clean fitment and reliability on Cummins applications. Customers typically see 250–400°F lower EGT with increased horsepower and torque when sized and installed correctly.
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.
Why Compounds for Towing?
Compound turbo setups deliver:
✓ 200-300°F cooler EGTs vs big single turbos
✓ Better low-RPM response for grades and heavy pulls
✓ Lower drive pressure = less head gasket stress
✓ Power without sacrificing daily drivability
Perfect for: Hot-shot haulers, RV owners, heavy fifth-wheel towers,
commercial applications.
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 for Compound Turbo Kits
A compound turbo kit uses two turbochargers working together, typically a smaller high-pressure turbo and a larger low-pressure turbo. The smaller turbo provides quick spool and low-RPM response, while the larger turbo supports high airflow and boost at higher RPMs. This setup delivers faster spool, higher horsepower potential, and lower exhaust drive pressure compared to a single turbo system.
Compound turbo setups are designed for serious diesel performance. Benefits include quicker spool-up, improved throttle response, higher boost capability, reduced exhaust gas temperatures, and better overall efficiency under load. They are ideal for towing, racing, and high-horsepower diesel builds where a single turbo becomes a restriction.
Yes, when properly sized and tuned, compound turbo kits can work very well for towing and street-driven diesel trucks. The small turbo improves low-RPM response and drivability, while the larger turbo handles airflow under load. Many compound systems are specifically designed to balance daily driving manners with heavy towing and performance use.
