4BT Compound Turbo Kit for 12V Cummins - 4BT Swap
The Diesel Power Source 4BT Compound Turbo Kit for 12V Cummins engines is built to solve the most common limitations of the 4BT platform: lag, heat, and restricted airflow at higher RPM. This compound system pairs a quick-spooling primary turbo with a high-flow atmospheric turbo to deliver smooth, controlled boost across a wider RPM range.
Using the same proven compound architecture DPS applies to 5.9L and 6.7L Cummins systems, this kit helps improve throttle response, reduce exhaust gas temperatures (EGTs), and support higher power potential without sacrificing drivability. It’s ideal for swapped and custom builds where packaging and performance both matter.
Why Compound Turbos on a 4BT?
- Faster spool and response: stronger low-end drivability vs. many single turbo setups
- Lower EGTs under load: improved airflow efficiency helps manage heat
- Smoother power delivery: usable boost from low RPM through the top end
- Room to grow: supports future fueling and performance upgrades
Common Applications
Designed for aftermarket and swap applications including Jeeps, classic trucks, step vans, off-road rigs, and custom diesel builds. Fitment depends on your engine placement, accessories, and fabrication requirements.
This kit is commonly used in swapped applications such as Jeep Wranglers, classic Chevy and Ford trucks, step vans, off-road rigs, and custom diesel builds. Fitment depends on engine placement and fabrication, not a specific vehicle model.
This is an aftermarket performance system designed for custom applications. Some fabrication, tuning, and supporting modifications may be required depending on your setup.
Compound turbos provide faster spool, lower EGTs, smoother power delivery, and improved airflow compared to a single turbo. This makes the engine more responsive and efficient under load.
Yes. The compound design allows for additional fueling and performance upgrades without pushing a single turbo beyond its efficiency range.
Yes. This system follows the same proven compound architecture DPS uses on 5.9L and 6.7L Cummins engines, adapted specifically for the 4BT.
