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Diesel Turbo Systems

Cummins Turbo Upgrades and Diesel Turbo Systems

S300 and S400 single turbos, compound turbo kits, 3rd Gen Swap kits, VGT upgrades, and HE-series replacement turbos from Diesel Power Source®.

Diesel Power Source® builds turbo systems for every Cummins platform it serves: 5.9L and 6.7L Dodge and Ram trucks, ISX15 / X15 semi trucks, Fummins and Chummins swaps, and 4BT projects. There are four ways to upgrade, from a factory-location replacement turbo to a full compound kit, and each one is sized to the truck and the fuel it is running. Use the categories below to find the right system, or call 801-930-8404 for a sizing recommendation.

Four Upgrade Paths

Replacement turbo, single turbo, Add-A-Turbo, or full compounds

CFD Tested

Turbos, manifolds, and piping are flow tested during design

Every Cummins Platform

5.9L, 6.7L, ISX15 / X15, 4BT, Fummins, and Chummins

Made in the USA

Designed and supported from West Jordan, Utah

Shop Turbo Systems by Category

  • S300 Single Turbos: Five configurations from the S362 to the S369, covering stock power to 750+ RWHP on the 5.9L and 6.7L Cummins. Journal or ball bearing at every size.
  • S400 Turbos: The atmospheric turbo in compound and Add-A-Turbo kits, and the single conversion turbo for the ISX15 / X15. The S478 is the most popular ISX conversion turbo.
  • HE-Series VGT Turbos: Factory-location replacement turbos for the 2007.5-2024 6.7L Cummins in 60mm, 63mm, and 66mm sizes, and for the ISX15 / X15. They keep factory emissions equipment and the exhaust brake.
  • 3rd Gen Swap Kits: Replace the factory VGT on a 2007.5-2018 6.7L Cummins with an S300 turbo and a DPS 2-piece manifold. The turbo stays in the factory location.
  • Compound Turbo Kits: Two turbos in series: an S300 with an S400 on pickups, and S400-over-S400 on the ISX15 / X15. The largest EGT reduction and power improvement in the DPS lineup.
  • Add-A-Turbo Kits: Keep the factory turbo and add a DPS S475 or S480 in front of it. Compound benefits with one new turbo, and a path to a full compound kit later.
  • Turbonator® VGT Upgrades: A variable geometry turbine housing that adjusts A/R from approximately 0.45 to 1.1. It spools 200-300 RPM sooner than a fixed housing, and the electronic version adds exhaust brake capability.
  • Ball Bearing Turbos: A dual ceramic ball bearing upgrade for DPS S300 turbos and compound kits. It spools approximately 200 RPM sooner at the same horsepower.
  • Fummins Turbo Kits: Compound turbo kits for Ford trucks with a Cummins swap.
  • Chummins Turbo Kits: Compound turbo kits for Chevy and GMC trucks with a Cummins swap. DPS is the only company making compound kits engineered for Fummins and Chummins chassis.
  • ISX15 / X15 Conversion Kits: S400 single turbo conversions, S400-over-S400 compound kits, and HE400VG replacement turbos for Cummins ISX15 / X15 semi trucks. An engine serial number (ESN) is required on every order.
  • Turbine Housings: Replacement and upgrade turbine housings, including the Turbonator® VGT housing for customers who already own a DPS turbo.

Four Types of Turbo System

Stock-Replacement Turbo

An HE-series VGT turbo that bolts into the factory location with a new actuator. Available in the factory size or with a larger compressor wheel.

Single Turbo

One DPS turbo replaces the factory turbo. The S300 is the single for 5.9L and 6.7L pickups, and the S400 is the conversion turbo for the ISX15 / X15.

Add-A-Turbo

The factory turbo stays as the high-pressure turbo and a DPS S475 or S480 is added as the atmospheric turbo. The S475 is matched from stock power to 600 RWHP.

Full Compound Kit

Two new DPS turbos share the work. Above about 600-650 HP, compounds are typically the way to keep low-end response, and when sized right they work at any power level, including stock fuel.

HP figures are approximate rear wheel horsepower and vary with tuning, fueling, and supporting modifications. Not sure which type fits? Use the Turbo Selector.

Why Choose Diesel Power Source® Turbo Systems

Complete Compound Kits

Every DPS compound kit includes both turbos, the exhaust manifold, hot-side and cold-side piping, oil lines, intake tubing, an air filter, a downpipe, and hardware. Kits connect to the factory intercooler, intake, and exhaust.

Engineered In-House

DPS air and exhaust products are designed in 3D CAD, CFD tested for flow, and machined on CNC equipment. DPS turbos are built on the HE-series, S300, and S400 platforms and are DPS turbos once modified.

Turbonator® VGT

The Turbonator® VGT starts at a small A/R for low-RPM spool and opens as exhaust flow rises, so one housing does the work of a small and a large fixed housing. It fits DPS S300 and S400 turbos.

Sized to the Build

Five S300 sizes, three HE-series sizes for the 6.7L, and S475, S478, and S480 options on the S400 platform let DPS match airflow to the fuel system instead of fitting one turbo to every truck.

How to Choose

  • Know your engine, year, and generation before you order.
  • Match the turbo to the fuel system the truck has, not only to a horsepower goal.
  • Decide whether you need the factory exhaust brake and emissions equipment to stay.
  • Consider the ball bearing and Turbonator® VGT upgrades if spool matters most.
  • Cummins ISX15 / X15: have your engine serial number (ESN) ready.

Good to Know

  • Diesel Power Source® does not sell emissions delete components.
  • On the 6.7L, full compound kits and 3rd Gen Swap kits replace the factory turbo and are for trucks that have already been deleted.
  • For 2019-2024 trucks, DPS currently offers the HE300VG replacement turbo and the turbo and manifold kit.
  • Tuning is the owner's responsibility. DPS does not sell tuners or tuning.
  • Warranty coverage varies by product under the Diesel Power Source® PMA. Registration within 14 days of purchase is required.

Turbo System Guides

Browse by platform: 5.9L Cummins | 6.7L Cummins | ISX15 / X15 | 4BT Cummins | Shop by Truck. Free shipping on orders over $350.

Cummins is a registered trademark of Cummins Inc. Diesel Power Source® is not affiliated with Cummins Inc.

Refine:

5.9 Cummins Turbo 6.7 Cummins Turbo HE300VG / HE400VG VGT Turbos 3rd Gen Swap Kits for 6.7L Cummins Compound Turbo Kits Add-A-Turbo Kits Turbonator® VGT Upgrades Ball Bearing Turbos Fummins Conversion Kits Chummins Conversion Kits ISX / ISX15 / X15 S300 Turbo Cummins S400 Turbo Cummins Turbine Housings

Diesel Turbo Systems - FAQs

It depends on the turbo, the load, and the tune. More airflow means more complete combustion, so less of the fuel's energy leaves as exhaust heat. DPS S300 single turbos typically run 70°F to 100°F or more cooler than the factory turbo. Compound kits give the largest EGT reduction in the DPS lineup.

A single turbo suits stock to moderate power. Above about 600-650 HP, a single turbo large enough to make the power gives up low-end response, so compounds are typically the better choice for a truck that tows and drives on the street. Compounds are not only for high-horsepower builds. When sized right they work at any power level, including stock fuel.

On the 6.7L Cummins, the HE363VG keeps factory fitment and the exhaust brake and covers stock to 550 RWHP. On the 5.9L, the S362 and S363 make boost early, and the S366 is the most requested single for trucks that tow and want more power. For heavy towing at higher power, a compound kit or an Add-A-Turbo kit is the stronger choice.

It depends on power. The factory transmission typically needs attention around 400 RWHP. The stock fuel system reaches its limit around 500-550 RWHP. Head studs are recommended above 45 PSI of boost on 1988-2002 engines, 55 PSI on 2003-2007 engines, and 48 PSI on 2007.5-2018 engines. Tuning is the owner's responsibility. DPS does not sell tuners or tuning.

HE-series replacement turbos for the 6.7L keep the factory emissions equipment and exhaust brake. On the 6.7L, full compound kits and 3rd Gen Swap kits replace the factory turbo and are for trucks that have already been deleted. Diesel Power Source® does not sell emissions delete components.

A compound kit includes both turbos, the exhaust manifold, hot-side and cold-side piping, oil lines, intake tubing, an air filter, a downpipe, and hardware. A single S300 turbo includes the turbo and installation hardware, with the manifold, gaskets, and oil lines sold separately. Each product page lists exactly what is included.

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#1 RATED COMPOUND TURBO KITS - FREE SHIPPING ON ORDERS OVER $350 - MADE IN THE USA - BACKED BY INDUSTRY LEADING ENGINEERING - SHOP WITH CONFIDENCE -
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