Product Description
Stop CP4 carnage before it spreads. The S&S Diesel CP4-6.7F-BP-G2.1 Gen2.1 CP4 Disaster Prevention Kit with Return Filter Assembly reroutes CP4.2 pump return flow through a dedicated spin-on filter and sends it back to tank—isolating metal debris so your injectors, rails, and lines survive a pump failure. OE-style quick connects speed installation and eliminate cut lines and compression fittings.
Why Buy From CPP Diesel
- Real diesel techs, clean fitment data, fast shipping.
- Only trusted brands like S&S Diesel.
- Internal-only links and resources to keep you on cppdiesel.com.
Key Features
- New & improved Gen2.1 DPK architecture with OE-style quick connects.
- Return filter assembly captures CP4 debris before it contaminates the tank.
- Billet filter head accepts standard spin-on filters (includes Donaldson P550943).
- Fuel supply tees off ~25" from CP4 inlet to reduce debris risks during install.
- One part number covers all years in range for Ford 6.7L.
- SEMA Certified Emissions Compliant (SC-SDM01-0020).
- Made in the USA.
Fitment
2011–2025 Ford Super Duty 6.7L Power Stroke — F-250, F-350, F-450, F-550. One part number fits all years in this range.
What’s Included
- S&S CP4-6.7F-BP-G2.1 Gen2.1 CP4 Disaster Prevention Kit assembly
- Billet filter head with Donaldson P550943 spin-on filter
- OE-style quick-connect lines and fittings
- Bracketry, hardware, and install components
- Instructions
Recommended Parts
- S&S Gen2 → Gen2.1 Billet Filter Head Upgrade — Shop S&S Diesel
- S&S Return Filter Assembly (Replacement) — Shop S&S Diesel
- Replacement Donaldson P550943 Filter — Fuel Filters
- Lift Pumps for CP4 Protection (AirDog / FASS) — Lift Pumps
- Ford 6.7L Fuel System Category — Ford 6.7L Fuel System
Helpful Notes
- This kit does not repair a failed CP4, it prevents the spread of debris to the rest of the system.
- If your CP4 already failed, pair this with proper fuel system remediation or consider the S&S DCR Conversion.
It filters the CP4.2 return flow so metallic debris doesn’t contaminate the injectors, rails, lines, and tank. That isolation can save thousands in parts and labor if the pump fails.
FAQ: Does this improve performance?Indirectly. By splitting supply farther from the pump and using OE quick connects, Gen2.1 can maintain CP4 output better at high RPM and reduce installation-related restriction or leak points.
FAQ: Is tuning required?No tuning is required. It is a mechanical protection system for the fuel return path.
FAQ: How often should I change the return filter?Follow your normal fuel filter intervals, and replace immediately after any suspected CP4 event. Keep a spare P550943 on hand.
FAQ: Will this fit all 2011–2025 model years?Yes—this single part number covers the full 2011+ Super Duty 6.7L range. Always verify under-hood routing differences during install.
