DPS S400 Compound Turbos | Twin Turbo Conversion Kit for Ford Cummins Swap
Complete Kit for 6.0 Cummins Conversions, Ford Super Duty Swaps, and All Fummins Builds
This full DPS Fummins compound turbo kit includes both turbos and everything needed for installation on your Ford Cummins conversion. Whether you're building a 6.0 to Cummins swap or a Super Duty with a 5.9 or 6.7 Cummins, this kit offers excellent fitment and maximum performance—clearing the heater/AC core with ease.
Turbo Sizing Options:
- Stage 2.5 – 625 HP: S362/68/.70 over S475
- Stage 4 – 675 HP: S363/68/.70 over S475
- Stage 4.5 – 675 HP: Ball Bearing S363/68/.70 over S480
- Stage 5 – 700 HP: S363/73/.80 over S475
- Stage 5.5 – 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
Kit Features:
- DPS S300 over S400 compound design with 75–83mm billet compressor options
- Race housing flows 9% more air and has a ported shroud/elbow outlet
- 3-piece exhaust manifold with built-in pyro ports
- Silicone low-pressure charge pipe with Kevlar/Nomex lining
- Chrome-plated aluminum high-pressure charge pipe
- Steel braided oil supply lines and stainless oil drain lines
- S400 atmospheric turbo with DPS billet compressor wheel
- Small turbo with 150% greater wastegate capacity
- Support bracket for large turbo
- Adjustable boost pressure with optional upgrades
- Includes intercooler hose for most Ford applications
Kit Includes:
- Air Filter, Cast Hot Pipe
- Support Bracket for S400
- 3-Piece Exhaust Manifold (pyro ports pre-tapped)
- Complete Intake System
- Silicone & Aluminum Charge Pipes
- DPS Turbo (64/71/12)
- S400 Turbo (80–83mm billet compressor, 96mm turbine, 1.32 A/R)
- Oil Lines & Adapters (2 supply, 2 drain)
- Gaskets, V-Band Clamps, T-Bolt Clamps, Mounting Hardware
- Exhaust Adapter (S400 to pipe)
- Installation Instructions
Performance Highlights:
- Supports 350–850 HP builds with fast spool-up and stock-like driveability
- EGTs reduced by 300–500°F compared to single turbos
- Boost-to-drive pressure ratio nears 1:1 for more efficient combustion
- Improved torque across the entire RPM range
- Designed using CFD & CAD/CAM software for factory-like fitment
Why DPS Compound Turbos Work So Well:
- Cooler intake air from dual-stage compressors (100+°F cooler than singles)
- Higher cylinder pressure improves intake stroke power
- Extra air molecules act as heat sinks, like jet engine bypass cooling
- More complete combustion and increased fuel efficiency
Important Notes:
- Downpipe not included, but V-band adapter provided (welds to 4" or 5" exhaust)
- Head studs recommended for:
- 2007.5–2012: Over 50 PSI (Fire Rings 55+ PSI)
- 2003–2007: Over 55 PSI (Fire Rings 65+ PSI)
- 1989–2002: Over 48 PSI (Fire Rings 55+ PSI)
- Newer Ford trucks may need a custom intercooler hose
Installation Considerations:
All Cummins conversion kits (Ford, Chevy, etc.) are considered custom applications. While this kit is engineered for close-fit clearance, routing intercooler piping, intake, and exhaust is the responsibility of the installer. Components like alternators, batteries, and intercoolers vary across builds, so some fabrication may be necessary.
This is the best-performing twin turbo kit for Ford 6.0 to Cummins swaps, Excursion Cummins swaps, and other Fummins projects.
