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Diesel Turbo Systems

Diesel Turbo Systems for Cummins

S300 and S400 single turbos, compound turbo kits, 3rd gen swap kits, VGT upgrades, and HE-series replacements - engineered and manufactured by Diesel Power Source.

Diesel Power Source builds complete turbo systems for every Cummins platform - from 5.9L and 6.7L Dodge Ram trucks to ISX15/X15 semi trucks, Fummins and Chummins conversion vehicles, and 4BT swap projects. Every DPS turbo system is a complete bolt-on kit with everything needed for installation. No hunting for parts from multiple suppliers, no custom fabrication, no compatibility guesswork.

Shop Turbo Systems by Category

From stock replacement HE-series VGT turbos to S300 and S400 singles, compound twin-turbo kits, 3rd gen swap kits, and the patented Turbonator VGT, Diesel Power Source covers every power goal and every Cummins platform. All turbo systems are designed using CAD/CAM software and validated through CFD testing for optimized airflow and fitment.

Complete Kits

Turbo, manifold, piping, oil lines, hardware - everything in one box

Cooler EGTs

Singles and compounds both reduce exhaust temps under load

Every Cummins Platform

5.9L, 6.7L, ISX15, 4BT, Fummins, Chummins

Designed and Built in the USA

Engineered, manufactured, and supported in Utah

Turbo System Categories

  • S300 Single Turbos - 62-69mm compressor, 350-775 HP. The most popular turbo upgrade for 5.9L and 6.7L Cummins. 10 stages with journal and ball bearing options at every size. Direct bolt-on, T3 flange.
  • S400 Single Turbos - 72-88mm compressor. Used as atmospheric turbo in compound kits or as standalone conversion turbo on ISX15/X15 semi trucks. The S478 is the most popular ISX conversion turbo.
  • Ball Bearing Turbos - Dual ceramic ball bearing CHRA upgrade available on every DPS S300 turbo and compound kit. Approximately 200 RPM faster spool. ~$550 upgrade.
  • HE-Series VGT Turbos - Direct factory replacements and DPS upgrades (63mm and 66mm) for 6.7L Cummins (2007.5-2024) and ISX15/X15 semi trucks. Emissions compatible. Maintains factory exhaust brake.
  • 3rd Gen Swap Kits - Replace the factory VGT on 2007.5-2018 6.7L Cummins with an S300 or S400 turbo + DPS manifold. Turbo stays in factory location, bolts to stock piping. No custom fabrication.
  • Compound Turbo Kits - Two-stage turbo systems (S300 + S400) for 5.9L, 6.7L, 4BT, Fummins, and Chummins. S400 + S400 for ISX15. Complete kits with both turbos, manifold, all piping, and hardware. The biggest EGT reductions and widest powerband in the DPS lineup.
  • Add-A-Turbo Kits - Keep your factory turbo, add a DPS S475 or S480 atmospheric turbo. Compound performance at a lower cost. Emissions compatible on 6.7L trucks - EGR, DPF, and factory exhaust brake all remain intact.
  • Turbonator VGT Upgrades - Patented variable-stator exhaust housing that adjusts A/R from approximately 0.45 to 1.1. Adds 200-300 RPM faster spool and optional exhaust braking to any DPS S300 or S400 turbo. Works on any year Cummins truck.
  • Fummins Conversion Kits - Compound turbo kits engineered specifically for Ford trucks with Cummins engine swaps. DPS is the only manufacturer building compound kits for Fummins chassis.
  • Chummins Conversion Kits - Compound turbo kits engineered specifically for Chevy/GMC trucks with Cummins engine swaps. DPS is the only manufacturer building compound kits for Chummins chassis.
  • ISX15 / X15 Conversion Kits - S400 single turbo conversions and S400-over-S400 compound kits for Cummins ISX15 and X15 semi trucks. HE400VG replacement turbos with 67mm stock or 70mm DPS upgrade compressor. ESN verification required.
  • Turbine Housings - Replacement and upgrade turbine housings including the Turbonator VGT housing for customers who already own a DPS turbo.

Why Choose Diesel Power Source Turbo Systems

Complete Bolt-On Kits

Every DPS turbo system includes everything needed for installation - turbo, manifold (where applicable), all piping, oil lines, intake, air filter, downpipe, gaskets, clamps, and hardware. No chasing parts from multiple suppliers. No fabrication.

Engineered, Not Resold

Diesel Power Source designs and manufactures every turbo and manifold at our facility in Utah. CAD/CAM designed, CFD tested for optimized airflow, and supported by the engineers who built them.

Turbonator VGT Technology

The patented Turbonator VGT exhaust housing adds variable geometry capability and optional exhaust braking to any DPS S300 or S400 turbo. No other aftermarket turbo manufacturer offers this technology.

Every Cummins Platform Covered

5.9L 12V and 24V (1989-2007), 6.7L (2007.5-2024), ISX15/X15 semi trucks, 4BT industrial, and Fummins/Chummins conversion vehicles. DPS is the only manufacturer building compound kits for Fummins and Chummins chassis.

How to Choose the Right Turbo System

  • Know your engine year and generation before ordering
  • Match turbo size to your fuel system capability - not just your HP goal
  • Consider ball bearing (~200 RPM faster spool) and Turbonator VGT (200-300 RPM + exhaust brake) upgrades
  • Contact DPS at 801-930-8404 for specific sizing recommendations

Turbo System Types at a Glance

  • Single turbo - One turbo replaces factory. S300 for pickups, S400 for ISX and high-power builds
  • Compound turbo - Two turbos working together. S300 high-pressure + S400 atmospheric. Widest powerband, biggest EGT reduction
  • Add-a-turbo - Keep factory turbo, add S475/S480 atmospheric. Budget compound path. Emissions compatible
  • 3rd gen swap - Replace factory VGT with S300/S400. Stays in factory location. No custom piping

Turbo System Guides

Need help choosing? Call 801-930-8404 or browse by platform: 5.9L Cummins, 6.7L Cummins, ISX15/X15, or 4BT Cummins.

Refine:

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

Diesel Turbo Systems - FAQs

Typical EGT reductions when towing heavy loads:

  • Upgraded single turbo (S300): 150-200°F cooler than stock
  • VGT upgrade: 100-175°F cooler than stock
  • Compound turbo system: 200-300°F cooler than stock

Results depend on your specific setup (tune, weight, terrain), but most customers report staying in the safe 1,000-1,200°F range instead of 1,300-1,500°F with stock turbos.

Lower EGTs mean less stress on head gaskets, manifolds, and turbo components—extending engine life.

It depends on your primary use:

  • Towing-focused (12k-20k+ lbs regularly): S300 singles or compound systems deliver the best EGT control, spool response, and sustained performance under load. Expect 150-300°F cooler EGTs.
  • Balanced street/tow: VGT upgrades or moderate S300 turbos maintain great daily drivability while improving towing capability.
  • Performance/competition: Larger S400 singles or aggressive compounds for 600+ HP builds prioritizing peak power.

Not sure? Contact our tech team for a personalized recommendation based on your truck, weight, and goals.

For reliable performance, we recommend:

Essential with any turbo upgrade:

  • Quality tuning matched to your new turbo
  • Upgraded exhaust (3" or 4" turbo-back)

Recommended for 500+ HP:

  • Upgraded intercooler (lowers intake temps 50-75°F)
  • Lift pump or fuel system upgrades
  • Transmission tuning or upgrades

Recommended for 600+ HP:

  • Injector upgrades
  • CP3 pump upgrade (6.7L)
  • Built transmission

Our tech team can help you plan the right supporting mods for your power goals and budget.

Single Turbo Best For:

  • Daily driving with occasional towing (under 15k lbs)
  • 400-550 HP builds
  • Budget-conscious upgrades
  • Simple installation
  • Good street manners

Compound Turbos Best For:

  • Heavy frequent towing (15k+ lbs) or hot-shot work
  • 550-700+ HP builds
  • Mountain terrain and sustained grades
  • Lowest possible EGTs and drive pressure
  • Maximum airflow capacity

Bottom line: If you tow heavy loads regularly or need sustained high-power output, compounds deliver superior thermal management and reliability. For moderate use, a quality single turbo provides excellent results at lower cost.

Installation time varies by kit complexity and experience level:

  • Single turbo upgrade: 6-10 hours for DIY, 4-6 hours professional
  • VGT upgrade: 4-6 hours for DIY, 3-4 hours professional
  • Compound system: 10-16 hours for DIY, 6-10 hours professional

Our kits include detailed photo instructions and many customers complete installation over a weekend. Professional installation typically costs $800-1,500 depending on kit and shop rates.

Pro tip: Read through the entire instruction manual before starting, and have all tools ready.

Diesel Power Source turbo systems are engineered specifically for diesel platforms, focusing on proper airflow, durability, and real-world performance rather than one-size-fits-all solutions.

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#1 RATED COMPOUND TURBO KITS - FREE SHIPPING ON ORDERS OVER $300 - MADE IN THE USA - BACKED BY INDUSTRY LEADING ENGINEERING - SHOP WITH CONFIDENCE -
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