The Diesel Power Source Add-A-Turbo Kit mounts a large atmospheric turbo (S475 or S480) over your factory turbo for a true compound system.
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High-quality turbocharger, hot-pipe and charge-air plumbing, oil feed/return lines, brackets, clamps, couplers, and hardware specific to your application. Components are designed to fit with factory accessories and packaging in the 6.7L engine bay.
Designed for 6.7L Cummins Ram 2500/3500 model years 2007.5 and newer. Works with the factory VGT and emissions equipment when installed as directed. Check individual product pages for year-specific notes.
Owners who tow, daily drive, or want dependable power increases with controlled EGTs. If your goal is usable torque and reliability rather than peak dyno numbers, a compound over stock kit is the right path.
An Add-A-Turbo kit adds a second turbocharger to an existing single-turbo diesel setup, creating a compound turbo system without replacing the primary turbo. The factory or upgraded turbo provides quick spool and low-RPM response, while the added turbo supports higher airflow and boost under load. This results in improved throttle response, lower exhaust gas temperatures, and increased horsepower compared to a single turbo.
Yes. Add-A-Turbo kits are designed to stack an S475 or S480 over the factory turbo while allowing emissions equipment to remain installed and functional when the kit is installed as directed. This makes them a popular option for emissions-equipped 6.7L Cummins trucks that need more airflow without removing factory hardware.
Power gains vary based on turbo selection, altitude, fueling, and tuning. Add-A-Turbo kits are designed to deliver strong, usable torque with cooler EGTs and sustained performance under load rather than only peak dyno numbers. Most drivers notice improved towing confidence and reduced heat immediately.
The S475 favors faster response and excellent towing manners, making it ideal for street and work trucks. The S480 provides more airflow headroom for higher fueling and horsepower goals. The right choice depends on how the truck is used and long-term power plans.
