CP4.2 Disaster Prevention Kit for 6.7 Powerstroke Gen2.1 - Protects

In this review the S&S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit is evaluated for owners of 2011+ 6.7 Powerstroke trucks who want to avoid catastrophic fuel system damage from CP4 failures. The bottom line: this kit is designed to stop CP4 debris from ever reaching injectors or the tank by splitting the fuel supply away from the CP4 and filtering return flow, and it does that with proven, real-world validation and OE-style quick connects that make the install straightforward for a competent DIYer or shop.

Key Features

• Made in the USA: Builds confidence in materials and machining quality for a critical fuel-system component.
• Fuel supply split-off 25 in away: Keeps the vehicle feed separate from the CP4 pump to avoid contamination of the active supply line.
• Return filter isolates CP4 debris: Catches metal and other particulates before they can be sent back to the fuel tank and redistributed.
• Gen2.1 billet filter head: Accepts standard spin-on filters so replacement parts are common and simple to service.
• Includes Donaldson P550943: Ships with a 9-micron, 99% efficiency filter to provide high filtration performance right out of the box.
• OE-style quick connects: Allows a neat installation using factory-like fittings that reduce the chance of leaks when installed properly.

Who It's For

This kit is best for 6.7 Powerstroke owners from 2011 through 2025 who want proactive protection against CP4 pump failures and the expensive injector damage they can cause. It is particularly suited to people who keep trucks long term, use diesel under heavy loads, or who value minimizing downtime and repair risk.

Those who should look elsewhere include owners who are unwilling to do a moderately involved plumbing install or those who prefer an OEM recall-style remedy; this is an aftermarket prevention solution that requires correct fitment and basic mechanical skills or professional installation.

Pros & Cons

Pros

• Effective debris isolation protects injectors, rails, lines, and the tank by filtering return flow before it re-enters the system.
• Comes with a high-quality Donaldson 9-micron filter for immediate protection without sourcing parts.
• One part number fits all 2011-2025 models, simplifying selection and compatibility concerns.
• OE-style quick connects and a billet head make the install tidy and serviceable.

Cons

• Installation takes time and care; some owners report it is not a plug-and-play 5-minute job.

Specifications

Brand	S&S Diesel Motorsport
Compatibility	2011-2025 6.7 Powerstroke
Included filter	Donaldson P550943, 9-micron at 99% efficiency
Filter head	Gen2.1 billet head for standard spin-on filters
Supply split location	25 in away from the CP4 pump
Compliance	CARB Compliant EO# D-756-6

Our Verdict

The S&S Gen2.1 Disaster Prevention Kit is a pragmatic, well-engineered solution for anyone wanting to avoid the high cost and downtime of CP4-related injector failures. It pairs a robust billet head and quality Donaldson filter with OE-style fittings for a serviceable install, making it a strong value for owners committed to protecting their 6.7 Powerstroke fuel system.

Frequently Asked Questions

Will this kit fit my 6.7 Powerstroke?
Yes, one part number covers 2011 through 2025 6.7 Powerstroke models per the manufacturer.

Does it include a filter or do I need to buy one?
The kit includes a Donaldson P550943 spin-on filter rated 9-micron at 99% efficiency.

Is installation difficult?
The kit uses OE-style quick connects for a tidy install, but it requires time and basic fuel-system plumbing knowledge or professional installation.