3rd Gen Cummins Compound Turbo Kits | 2003–2007 5.9 Cummins

From stock power up to 1100 HP, DPS 3rd Gen compound turbo kits fit like OEM and attach directly to the factory exhaust while retaining the factory battery location. Designed for 2003, 2004, 2005, 2006, and 2007 Cummins trucks, these kits provide maximum power and drivability.

Available S300 over S400 Turbo Stages:

Stage 2.5 – 625 HP: S362/68/.70 over S475

Stage 3 – 650 HP: S362/68/.70 over S480

Stage 3.5 – 625 HP: Ball Bearing S362/68/.70 over S475

Stage 4 – 650 HP: S363/68/.70 over S475

Stage 4B – 675 HP: S363/68/.70 over S480

Stage 4.5 – 650 HP: Ball Bearing S363/68/.70 over S475

Stage 4.5B – 675 HP: Ball Bearing S363/68/.70 over S480

Stage 5 – 700 HP: S363/73/.80 over S475

Stage 5.5 – 700 HP: Ball Bearing S363/73/.80 over S475

Stage 6 – 750 HP: S363/73/.80 over S480

Stage 6.5 – 750 HP: Ball Bearing S363/73/.80 over S480

Stage 8 – 1100 HP: S366/73/.80 over S480

Stage 8.5 – 1100 HP: Ball Bearing S366/73/.80 over S480

How to Choose Your Compound Kit:

Estimate your horsepower (add ~25% with compounds)

Select the stage based on your target HP

Consider adding a Turbonator® VGT for faster spool-up and exhaust braking

Optional ball bearing upgrade for quicker spool (150–200 RPM faster)

Key Features:

OEM-like fit — attaches to factory exhaust, keeps battery location

Wastegated for boost adjustment (except VGT option)

3-piece exhaust manifold with pre-tapped pyro ports

Kevlar/Nomex-lined silicone charge pipe (better flow than steel)

High-pressure metal charge pipe

Cast hot pipe for durability

Flexible steel braided oil lines & stainless drain lines

Support bracket for large turbo

Available Turbonator® VGT housing for spool and braking

Performance Benefits:

Lower EGTs by 250–450°F compared to single turbo

Increase HP by 22%–30% depending on setup

Excellent towing performance

Why DPS Compounds Perform:

Cooler intake air — over 100°F cooler per psi than single turbos

Near 1:1 boost-to-drive pressure for efficient combustion

More complete fuel burn = cleaner exhaust

CAD/CAM & CFD tested for factory-like fit and performance

Kit Includes:

Both S300 and S400 turbos (except add-a-turbo)

3-piece exhaust manifold

Air, oil, and exhaust tubing

Exhaust adapter for factory exhaust connection

Installation Notes:

Head studs recommended for 55+ PSI boost, fire rings for 65+ PSI. Kits are adjustable and capable of over 55 PSI. These kits do not have a CARB exemption; however, our exhaust manifolds do.

Gday
4
Posted by Tyler Lee on Jul 16, 2023

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 yall!
04 Cummins
5
Posted by Christ Schmitt on Nov 22, 2023

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.....
Compound Kit is Sweet
5
Posted by Larry Bird on Oct 31, 2023

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
Hello, I
5
Posted by Greg P on Mar 31, 2023

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.
Towing
5
Posted by Michael Venter on Nov 26, 2022

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
Stocker
5
Posted by R Zep on Jun 5, 2022

Great compounds,makes towing a breeze with 50# of boost & egt about 300 less now
Stocker
5
Posted by Carl M on May 15, 2021

I bought this add a turbo kit for my 2005 Cummins and what a difference it made towing. I live in the west and travel some good mountain passes with a travel trailer. No issues with the EGTs and no down shifting. I already want to replace my stock turbo for their Turbonator turbo. Great kit! and everything came in it to install.
Stocker Kit for Ram
5
Posted by Greg Hillerby on Feb 19, 2020

I don't 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's 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 wasÂ 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 it's 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.

VGT

Compounds for 5.9 Cummins 2003 - 2007