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Is It Snake Oil? - Part II
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S&S Diesel Gen2.1 CP4 Disaster Prevention Bypass Kit (CP4-6.7F-BP-G2.1) – 6.7 Powerstroke
Protect your 2011–2025 Ford 6.7L Powerstroke fuel system from one of the most expensive failures in the diesel world. The factory CP4 high-pressure fuel pump is known for sudden, catastrophic failures that send metal debris through injectors, rails, fuel lines, and even back into the tank—often resulting in repair bills of $8,000–$12,000+.
The S&S Diesel Motorsport Gen2.1 CP4 Disaster Prevention Kit (part # CP4-6.7F-BP-G2.1) is the upgraded, second-generation solution from the company that pioneered this protection concept in 2016. It has safeguarded thousands of trucks and continues to set the standard.
How the Gen2.1 Kit Works
This bypass kit supplies clean, filtered fuel independently to the CP4 pump case and metering unit/plungers. In the event of a CP4 failure, contaminated case fuel is rerouted through a high-efficiency return filter before it can reach your injectors, rails, lines, lift pump, or fuel tank.
Major Gen2.1 improvements over the original kit include:
- Fuel supply split-off point moved 25 inches away from the CP4 (greatly reduces risk of debris back-feeding into the clean supply line).
- All OE-style quick-connect fittings — no cutting the factory supply line, no compression fittings, and fewer potential leak or debris-introduction points during installation.
- CNC-machined billet aluminum return filter head that uses a standard, readily available Donaldson P550943 spin-on filter (9-micron at 99% efficiency) to trap debris before it reaches the tank.
Key Features & Benefits
- Superior debris protection — Safeguards injectors, rails, lines, and tank from CP4 failure contamination.
- Extended driving range — Many owners can continue driving (sometimes significant distances) after a failure until they can get to a shop.
- Improved CP4 performance — Supports better output past 3,000 RPM.
- Easy, clean installation — Bolt-on design with OE quick connects (approx. 4–5 hour install time). No special cutting or permanent modifications required.
- Universal fit — One part number covers all 2011–2025 6.7L Powerstroke Super Duty trucks (F-250, F-350, F-450, F-550).
- Premium components — Billet aluminum construction with rubber isolators to minimize NVH transfer.
- Made in the USA by fuel system engineers with decades of experience.
- Proven design — Thoroughly validated in real-world testing; the original S&S kit protected thousands of trucks.
Kit Includes
- CNC-machined billet return filter head with mounting bracket and isolators
- Donaldson P550943 fuel filter (9-micron @ 99% efficiency)
- All quick-connect fuel lines
- Complete installation hardware
Specifications & Fitment
- Part Number: CP4-6.7F-BP-G2.1
- Fits: 2011–2025 Ford F-250 / F-350 / F-450 / F-550 6.7L Powerstroke
- Warranty: 2 Year / Unlimited Mileage
- CARB EO#: D-756-6 (legal for use in California)
Don’t wait for a CP4 disaster. Install the S&S Diesel Gen2.1 Disaster Prevention Kit and drive with confidence knowing your expensive fuel system components are protected.
This is the upgraded, no-compromise version of the original bypass kit that diesel owners have trusted for years. One of the smartest, most cost-effective upgrades you can make to a 6.7 Powerstroke.
S&S Diesel Gen2.1 CP4 Disaster Prevention Bypass Kit (CP4-6.7F-BP-G2.1) – 6.7 Powerstroke
Protect your 2011–2025 Ford 6.7L Powerstroke fuel system from one of the most expensive failures in the diesel world. The factory CP4 high-pressure fuel pump is known for sudden, catastrophic failures that send metal debris through injectors, rails, fuel lines, and even back into the tank—often resulting in repair bills of $8,000–$12,000+.
The S&S Diesel Motorsport Gen2.1 CP4 Disaster Prevention Kit (part # CP4-6.7F-BP-G2.1) is the upgraded, second-generation solution from the company that pioneered this protection concept in 2016. It has safeguarded thousands of trucks and continues to set the standard.
How the Gen2.1 Kit Works
This bypass kit supplies clean, filtered fuel independently to the CP4 pump case and metering unit/plungers. In the event of a CP4 failure, contaminated case fuel is rerouted through a high-efficiency return filter before it can reach your injectors, rails, lines, lift pump, or fuel tank.
Major Gen2.1 improvements over the original kit include:
Fuel supply split-off point moved 25 inches away from the CP4 (greatly reduces risk of [...]
S&S Diesel Gen2.1 CP4 Disaster Prevention Bypass Kit (CP4-6.7F-BP-G2.1) – 6.7 Powerstroke
Protect your 2011–2025 Ford 6.7L Powerstroke fuel system from one of the most expensive failures in the diesel world. The factory CP4 high-pressure fuel pump is known for sudden, catastrophic failures that send metal debris through injectors, rails, fuel lines, and even back into the tank—often resulting in repair bills of $8,000–$12,000+.
The S&S Diesel Motorsport Gen2.1 CP4 Disaster Prevention Kit (part # CP4-6.7F-BP-G2.1) is the upgraded, second-generation solution from the company that pioneered this protection concept in 2016. It has safeguarded thousands of trucks and continues to set the standard.
How the Gen2.1 Kit Works
This bypass kit supplies clean, filtered fuel independently to the CP4 pump case and metering unit/plungers. In the event of a CP4 failure, contaminated case fuel is rerouted through a high-efficiency return filter before it can reach your injectors, rails, lines, lift pump, or fuel tank.
Major Gen2.1 improvements over the original kit include:
- Fuel supply split-off point moved 25 inches away from the CP4 (greatly reduces risk of debris back-feeding into the clean supply line).
- All OE-style quick-connect fittings — no cutting the factory supply line, no compression fittings, and fewer potential leak or debris-introduction points during installation.
- CNC-machined billet aluminum return filter head that uses a standard, readily available Donaldson P550943 spin-on filter (9-micron at 99% efficiency) to trap debris before it reaches the tank.
Key Features & Benefits
- Superior debris protection — Safeguards injectors, rails, lines, and tank from CP4 failure contamination.
- Extended driving range — Many owners can continue driving (sometimes significant distances) after a failure until they can get to a shop.
- Improved CP4 performance — Supports better output past 3,000 RPM.
- Easy, clean installation — Bolt-on design with OE quick connects (approx. 4–5 hour install time). No special cutting or permanent modifications required.
- Universal fit — One part number covers all 2011–2025 6.7L Powerstroke Super Duty trucks (F-250, F-350, F-450, F-550).
- Premium components — Billet aluminum construction with rubber isolators to minimize NVH transfer.
- Made in the USA by fuel system engineers with decades of experience.
- Proven design — Thoroughly validated in real-world testing; the original S&S kit protected thousands of trucks.
Kit Includes
- CNC-machined billet return filter head with mounting bracket and isolators
- Donaldson P550943 fuel filter (9-micron @ 99% efficiency)
- All quick-connect fuel lines
- Complete installation hardware
Specifications & Fitment
- Part Number: CP4-6.7F-BP-G2.1
- Fits: 2011–2025 Ford F-250 / F-350 / F-450 / F-550 6.7L Powerstroke
- Warranty: 2 Year / Unlimited Mileage
- CARB EO#: D-756-6 (legal for use in California)
Don’t wait for a CP4 disaster. Install the S&S Diesel Gen2.1 Disaster Prevention Kit and drive with confidence knowing your expensive fuel system components are protected.
This is the upgraded, no-compromise version of the original bypass kit that diesel owners have trusted for years. One of the smartest, most cost-effective upgrades you can make to a 6.7 Powerstroke.
5/5 Stars out of 3 Reviews
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Terry Boone (OH) | August 22nd, 2025
This kit is complete with full instructions. Order was delivered in a timely manner. Seems to be a well made product That installs in good manner. Thank You for your Engineering Excellence!
Travis wells (Alabama) | April 9th, 2025
I recently purchased a 6.7 powerstroke S&s cp4 disaster prevention kit. I had the truck apart repairing a separate issue and decided while putting it back together I wanted to add this kit while I had it down. I contacted full force and confirmed it was in stock and I ordered it. Within a couple of hours I had already received confirmation it had been shipped!!! Outstanding service!!! The kit arrived promptly and was a BREEZE to install. Came with ALL necessary hardware. These guys are great to do business with and I will definitely be a return customer.
Michael Zundel (Smithville) | May 8th, 2023
Ordered the kit and it arrived super quick. I was very suprised. HD the kit installed and it works perfectly. There are cheaper knockoff kits out there but dont go that route. Get the original. Make sure you use Donaldson filters too they are by far better than the others.
S&S Diesel CP4-6.7F-BP-G2.1 Installation Instructions
Proposition 65 Warning Information -
P65Warnings.ca.gov
Fits: 6.7 Powerstroke F-250/350 2015-2019, F-450 2015-2017, F-550 2017, Cab & Chassis
Fits: S&S Diesel Ford 6.7L Disaster Prevention Kit Gen2.1
Fits: 6.7 Powerstroke 2011-2014
Fits: 6.7 Powerstroke 2015-2016
Fits: 6.7 Powerstroke 2017-2019