S&S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit for 2011+ 6.7 PowerStroke with Donaldson spin-on

The S&S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit is an upgraded bypass system that prevents CP4 pump debris from contaminating injectors, fuel lines, and the fuel tank on 2011–2025 6.7 Power Stroke trucks.

Built by fuel-system engineers who developed the original Disaster Prevention Kit, the Gen2.1 improves debris management and leak resistance while keeping install times low. It uses OE-style quick-connect hoses, a split fuel supply farther from the CP4 pump, and a billet return filter head that accepts a common Donaldson spin-on filter. The result is a cleaner, more reliable way to route CP4 case return fuel and trap contaminants before they can reach the tank or supply pump.

How does the Gen2.1 kit stop CP4 debris from reaching injectors?

The kit separates the fuel supply and case return so metering units and plungers receive filtered fuel while contaminated case return is routed through a dedicated filter. A billet return filter head with a Donaldson P550943 spin-on element captures particles before they travel downstream.

• Filtered supply line to CP4 metering unit maintains clean fuel for injectors
• Dedicated return path routes case debris to the spin-on filter
• Donaldson P550943 filter (9-micron, 99% efficiency) traps harmful particles
• Prevents debris from reaching rails, injectors, and the tank

What installation improvements does Gen2.1 make over the original kit?

Gen2.1 removes threaded fittings and cut-line deburring by using all OE-style quick connects, reducing leak points and the chance of introducing debris during install. The fuel supply split is positioned 25 inches from the CP4, lowering the risk of contaminated case fuel back-feeding the clean line.

• OE-style quick connects—no cutting factory supply line required
• No compression or threaded joints that can leak or shed debris
• Supply split 25" from CP4 for safer separation of clean and case fuel
• Direct fit for 2011–2025 6.7 Power Stroke trucks, simplifies selection

What happens to debris once it exits the CP4 pump case?

Debris is routed into the billet return filter head where the spin-on Donaldson element captures particles before they can reach the tank, lines, or supply pump. This prevents the need to drop the tank to remove contaminants after a failure.

• Billet filter head collects case return flow cleanly and securely
• Spin-on Donaldson P550943 filter prevents debris migration to the tank
• Retrofit-friendly—filter upgrade fits earlier Gen2 kits with shared fittings
• Replacement filters widely available at parts stores, lowering maintenance cost

Will this kit fit my truck and how much maintenance is involved?

The Gen2.1 kit fits all 6.7 Power Stroke Super Duty pickups from 2011 through 2025 under a single part number, eliminating year-specific SKU confusion. Maintenance centers on periodic spin-on filter replacement using readily available Donaldson elements.

• Single part number covers 2011–2025 6.7 Power Stroke trucks
• Donaldson P550943 spin-on filter is replaceable and inexpensive
• Filter head uses OE-style quick connects for straightforward servicing
• Optional upgrade pieces available for earlier Gen2 owners

Who is this for? The Gen2.1 Disaster Prevention Kit is aimed at truck owners, fleet operators, and diesel technicians who want to protect expensive injectors and fuel-system components from CP4 failures without lengthy installs or frequent proprietary parts. If you own a 2011–2025 Ford Super Duty with the 6.7 Power Stroke and value proven engineering, easier servicing, and better debris control, this kit offers an affordable, OEM-inspired safeguard.