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From Stock Horsepower up to 1300 HP.
S300 / S400 Compound Turbo kit for your Dodge Ram. Create the ultimate compound turbos for towing, race twins or weekend warrior. Choose your turbo sizes for your Cummins twin turbo kit and even use your own turbos. Significantly improves your diesel performance. We have compound kits for 1st Gen, 2nd Gen, 3rd Gen and 4th Gen Cummins engine.
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 Turbine/Exhaust Housing 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:
***Best towing kits for 5.9l Cummins trucks are any of the kits using the 62mm compressor wheels, or the Stock Turbo.
***Best towing kits for 6.7 trucks Stage 5.5 to Stage 7.
Note: All our compound kits are good for towing.
Reasons Why Our Compound Turbo Setups Work So Well
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:
**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.
The turbonator made my 12V come to life. Before and after difference on my 96 was night and day. noticible fuel savings and power gains, can't wait to see how she tows! BB was very helpful and fun to talk with.
I had the compound kit on my 5.9 Cummins for 4 years now. It made a huge difference in towing trailers. It spools up quick for when I need to get the camper or the trailer moving from a stop. Also, it does not take a lot of effort to make a pass on someone when I’m in a hurry. I would recommend this kit to anyone, whether they want to play or work.
Hey fellas, did some upgrades after your compound set up. Hamilton stage 1 head, full manual valve body, 125 industrial injectors. Makes 683 hp and just under 1300tq at 7200 ft. Egts never get over 1100 no matter what I’m pulling or how I have my attitude adjusted. Tuned by grand by truck shop. This thing is a pulling beast. Thanks again.
Not that Larry Bird. Your Add A Turbo Kit for my 2012 made a huge improvement on towing with my truck. Great power and helped with my EGT temps. Once the stock turbo goes out I plan to upgrade with the Turbonator. Thanks for making a great fitting kit
Best thing I could have done sooner was do compounds for my 6.7Cummins! Stock fuel with some items not on the truck and it tows awesome. Steep grades and EGTs issues are a thing of the past! Great kit
Great choice for an aftermarket turbo, or even compounds! My DPS add on turbo kit is amazing, completely changed the truck, from EGTs, to spool and psi. Completely recommend y'all!
I put one of these kits on my 04 Cummins probably 5 or 6 years ago. I have nothing but good to say about it. It has towed loads that do not belong behind a pickup, on a regular basis and has never once disappointed.....
Hello,
I do not normally comment on my truck part purchases, but I felt the quality of your kit was worth taking the time for. I recently purchased one of your stocker / S475 kits for my 06 ram. I have to say I am very impressed with the quality and packaging you guys do. This is my first compound turbo set up. I looked at many kits before purchasing yours. I looked at cheaper and more expensive. I had nearly talked myself into buying a cheaper kit. After receiving your kit I was immediately satisfied with spending the extra money on it. I opened the kit and was very impressed with the packaging alone. I thought to myself, if it performs half as well as it is packaged, I was going to be very happy. I had one issue after installation, but it turned out to be my fault for assuming. I assumed the tube from the output of the S475 to the input of my stock turbo was molded to the connector that uses V band clamp onto the S475. I had one extra clamp once installed and I thought it was odd, however I took the truck for a test ride and was very impressed with the faster spool up but the system got very loud and not as much boost as I had anticipated. I found out very quickly where the extra clamp went. After that mistake was remedied, the system is performing flawlessly. I am very satisfied with this kit. I look forward to putting it to the test towing in the Colorado mountains. I will be purchasing your intake for this same truck as well as probably upgrading my stock turbo to one of your new ball bearing turbos in the near future. I will not hesitate to recommend you guys to anyone who asks.
Thank you,
Greg