S&S Diesel S&S Diesel Motorsports L5P CP3 Conversion Kit with 12mm Pump , Duramax | 2017 - 2025

The S&S Diesel Motorsports L5P Duramax CP3 Conversion Kit is a high-performance fuel system upgrade designed to replace the factory high-pressure pump on 2017–current GM trucks equipped with the L5P Duramax. Engineered specifically for competition applications, this conversion delivers improved reliability, consistent fuel delivery, and increased fueling capability compared to the factory setup.

Each kit features a brand-new Bosch CP3 base pump, expertly modified and calibrated by S&S Diesel Motorsports to maintain smooth, linear fuel output and high efficiency up to 4,000 RPM. The system is fully compatible with the factory low-pressure supply pump, allowing for a straightforward installation while retaining OEM-style drivability characteristics when properly tuned.

Every CP3 pump includes an individual test report, verifying performance and quality prior to shipment. Customers can choose from 10mm, 12mm, or 14mm stroker CP3 options to match their horsepower goals and fuel demand, from mild performance builds to high-output competition setups.

Key Features:

• High-pressure CP3 conversion designed for competition use

• New Bosch CP3 pump modified and tested by S&S Diesel Motorsports

• Maintains linear output and efficiency up to 4,000 RPM

• Compatible with the factory fuel supply pump

• Individual pump test report included

• Available in 10mm, 12mm, or 14mm configurations

• Fits 2017–current GM L5P Duramax trucks

Note: Tuning is required for installation. For competition use only.