CP3 Conversion Kit with Exergy Sportsman CP3

Features:

• Includes Exergy Sportsman CP3
• Supports up to 750 HP with proper tuning
• Billet aluminum CP3 pump mounting plate
• High-pressure fuel line and rail fitting included
• Compatible with 30% over Exergy injectors
• Works with VGT or fixed vane turbo kits
• Requires CP3-compatible low-pressure lift pump
• Not compatible with OEM L5P in-tank pump
• Includes stainless hardware and CP3 fittings
• Great option for replacing failed HP4 pump

Premium CP3 Conversion for GM 6.6L Duramax

If you’re tired of pushing your luck with the factory HP4 pump on your L5P Duramax, or worse, already dealing with a failure, the Wehrli CP3 Conversion Kit with Exergy Sportsman CP3 offers a reliable, performance-focused solution. Designed specifically for 2017–2025 Silverado and Sierra 2500HD/3500HD trucks, this kit replaces the stock high-pressure fuel pump with a proven Exergy Sportsman CP3, giving you smoother fueling, better reliability, and solid power potential in one well-rounded package. At the heart of the system is the Exergy Sportsman CP3, a trusted workhorse built to support trucks running stock injectors or mild upgrades, like Exergy’s 30% over units. It’s an excellent match for builds using factory VGT chargers or Wehrli’s drop-in fixed vane turbos, like the S364.5 or S369. With the right tuning and supporting mods, this setup is capable of supporting up to 750 rear-wheel horsepower, all while maintaining the drivability you need from a street or tow rig.

High-Quality Hardware

The kit includes a black anodized billet aluminum CP3 mount plate, a high-pressure fuel line, high-pressure rail fitting, stainless barb fitting, and all the hardware and clamps needed for a clean install. Everything is engineered to bolt right into the L5P chassis, making it a much easier swap than piecing things together yourself. It’s important to note that this system requires an aftermarket low-pressure lift pump capable of delivering 15–20 PSI to the CP3. It’s not compatible with the factory in-tank pump or any high-pressure lift systems designed specifically for the HP4. But with the right pump feeding it, this conversion gives you more consistent fueling and long-term reliability, especially under load or in high-demand performance applications.

Fits: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM 6.6L Silverado/Sierra 2500HD/3500HD Duramax

Application Note: Requires use of an aftermarket low pressure / CP3 compatible lift pump with 15-20PSI of pressure. Not compatible with OEM L5P in-tank pump or high pressure lift pumps designed for use with HP4 injection pumps.