CUMMINS COMPOUND TURBOS | BOOST YOUR DIESEL PERFORMANCE 5.9L & 6.7 for 1st Gen, 2nd Gen, 3rd Gen & 4th Gen PICKUPS
The best compound turbo setup for Cummins Diesel!
From Stock Horsepower up to 1300 HP.
Upgrade your Cummins diesel engine with our top-of-the-line compound turbos. Whether you’re towing, racing, or just want more power, our compound turbo kits are designed to deliver exceptional performance. Choose from various stages and configurations to suit your Cummins engine generation.
Compound Turbo Kit Selector:
- Stage 1 Stock turbo + S475
- Stage 2 S362/65/0.7 over S475 **Not available for 1st gen trucks
- Stage 2.5 S362/68/0.7 SXE Billet over S475
- Stage 3 S362/71/0.7 over S475
- Stage 4 S363/68/0.7 over S475
- Stage 4.5 S363/68/ Ball Bearing over S475
- Stage 5 S363/73/0.8 over S475
- Stage 5.5 S363/73/ Ball Bearing over S480*
- Stage 6 S364/71/0.7 over S475*
- Stage 8 S366/73/0.8 over S480*
- Stage 8.5 S366/73/ Ball Bearing over S480*
*Kit available for 6.7 Cummins engines.
Choose Your Cummins Compound Turbo Kit
Find your new horsepower level after adding a twin turbo kit / compound turbo kit by multiplying your current horsepower by 1.25.
Knowing your horsepower level after adding a compound turbo will help you choose the right Stage from the list.
Select Cummins year from the drop-down boxes.
Select Your diesel turbo kit Stage from the drop-down boxes
Select Turbonator® VGT Upgrades from the drop-down boxes, if any
Select Large Turbo Upgrades from the drop-down boxes, if any
Features & Benefits for your Ram 6.7 turbo replacement:
- Excellent Fit: Our bolt-on application ensures a factory-like fit without any cutting or fabrication.
- Wastegated Option: Allows for boost adjustments (except for the Turbonator® VGT option).
- 3-Piece Exhaust Manifold: Included for superior flow.
- High-Flow Air Filter: Ensures optimal air intake.
- Kevlar/Nomex Lined Silicone Charge Pipe: Provides better flow and fitment compared to metal.
- High-Pressure Metal Charge Pipe: Included.
- Cast Hot Pipe: Durable and reliable.
- Flexible Steel Braided Oil Supply Lines: Ensures oil flow.
- Stainless Oil Drain Lines: Reliable drainage.
- S400 Atmospheric Turbocharger: Efficient and powerful.
- VGT Option: Available for the S300 High Pressure Wastegated turbo.
- Ball Bearing Turbo: Lightning-fast spool-up.
- Support bracket: for Lower (large) turbocharger.
- Lower EGTs: Reduces exhaust gas temperatures.
- Increase Horsepower: Up to 30% depending on turbo selection.
- Best Towing Kits: Choose 62mm compressor wheels or the Stock Turbo.
- Increased Power: Intake stroke produces power.
- Computer Flow Model Tested: Unmatched air and exhaust flow.
- 1st Gen Cummins Compatible: Exclusive compound turbos for 1st gen trucks.
- Exhaust Brake: Available with Hybrid VGTs.
- Easy Installation: Bolts right to factory exhaust (2003-2018 trucks).
- Cooler Air: Dual-staged compressors provide cooler boost air.
- Higher Pressure: Boost pressure and exhaust drive pressures become nearly equal.
- Efficient Heat Management: Extra air molecules in the cylinder retain heat.
- Exhaust Downpipe: 1989-2002 Trucks come with 4" exhaust downpipe.
Reasons Why Our Compound Turbo Setups Work So Well
- More cool air goes into the cylinders because the dual-staged compressors work together in their best zones. The boost air is typically over 100 deg. cooler per pressure made than from a single turbo.
- The air entering the cylinder is at higher pressure. This causes the boost pressure and exhaust drive pressures to become nearly equal. The intake stroke can actually produce power.
- Extra air molecules in the cylinder don't carry heat out of the cylinder. They carry heat away from the cylinder, like a jet engine's bypass ratio cools the jets.
- It has more complete combustion in the cylinders because there’s more air in the cylinder to burn all the fuel.
- Diesel Power Source makes turbo kits for 5.9 Cummins engines using CAD/CAM Software, and CFD (Computational Fluid Dynamics) Testing. Our Cummins compound turbos give a factory-like fit with the highest performance possible. Everything fits like it was built from the factory, and it performs so well. You’ll wonder how you ever drove without them.
Head Studs Recommended For:
1988-2002 engines over 48 psi boost, and fire rings for over 55 psi boost
2003-2007 engines over 55 psi boost, and fire rings for over 65 psi boost
2007.5-2018 6.7 engines, over 45 psi boost, and fire rings for over 55 psi boost
Our Compound Turbo systems can reach pressures of 55 psi or higher, and can be adjusted to suit different trucks.
Have a Fummins or Chummins Conversion? Click this link for our Fummins / Chummins kits:
Kits are complete, they include:
- Both s300 and s400 turbos (except piping and Stage 1 Kits)
- Exhaust Manifold (except piping)
- All air, exhaust, and oil tubing
- Air Intake and filter
- Downpipe or Adapter to fit factory exhaust (depending on truck)
**Note: The Piping Kit option does NOT include any turbos, and the Stage 1 (Stock Turbo Option) only includes one turbo in the kit.
Fits: 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1998.5 1999 2000 2001 2002 2003 2004 2005 2006 2007 2007.5 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Year Trucks
Our Cummins Compound Kit will improve all aspects of performance whether you have a 2006 Cummins or a 1996 Cummins.
FAQ's
Q: Can I use my own aftermarket turbo with this kit?
A: Most S300 turbos, (ATS Diesel Performance, Industrial Injection, Stainless Diesel, Fleece Diesel, or Garret PowerMax, HTT, Borg Warner or other turbos) can be used in this kit.
Q: If I use my factory turbo, what modifications do I need to make to it into a Cummins add a turbo kit?
A: To make the Stocker or Cummins Turbo kit work, some small changes are made to your stock turbo. Different years of trucks require different mods, but they are all very minor modifications to the stock turbo.
The last 5.9L engine is in 2007 Cummins, which is the same as the 2006 Cummins.
Free shipping to the lower 48 states. When shipping to anywhere outside the lower 48 states, additional shipping fees may apply.
***On 2nd Gen trucks with automatic transmission you will need to remove, bypass, or relocate the trans oil heat exchanger on the side of the engine block to frame. We sell the relocation kits for $149, select in the drop down menu.
***Only 2002 and older kits come with a downpipe, 2003 and newer kits bolt right to the factory exhaust.
***These kits do NOT have a CARB exemption. However, our exhaust manifolds do.
