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For very minimal investment, SS Diesel Motorsport’s Gen2.1 CP4 disaster prevention kit can save you thousands in the event your 6.7L Power Stroke’s high-pressure fuel pump checks out. Its design supplies both the CP4.2 and its metering unit independently with clean, filtered diesel fuel and reroutes the CP4.2’s case fuel back to the tank. This keeps the fuel injectors, rails and lines from seeing any pump debris (a return filter isolates debris before fuel flows back to the tank). The