H&S Motorsports 131002-1 Dual High Pressue Fuel Kit w/o CP3 | 2011-2014 GM 2500HD/3500HD 6.6L Duramax

Features:

• Supports 900+ horsepower fuel demands
• Eliminates CP4 pump rail pressure limitations
• Maintains 29,000 PSI under heavy load
• Uses proven CP3 pump design (not included)
• Compatible with aftermarket lift pump systems
• Ideal for high-performance or competition builds
• Includes all necessary fittings and lines
• Designed for easy CP3 pump integration
• Improves fuel volume and pressure stability

Dual High Pressure Fuel Kit for GM 2500HD/3500HD

If you’re pushing your LML Duramax beyond the 500-horsepower mark, you already know the factory CP4 pump just isn’t going to keep up. That’s where the H&S Motorsports Dual High Pressure Fuel Kit comes into play. Built for 2011–2014 GM 2500HD and 3500HD trucks with the 6.6L Duramax, this system is designed to eliminate the high-pressure fuel bottleneck that limits power and performance in high-output builds. And it does it by letting you bring in a second CP3 pump—known for its reliability and fuel volume—without overhauling your entire fuel system. The genius behind this kit lies in its ability to maintain rail pressure under serious demand. We’re talking 29,000 PSI without flinching, even at injection durations nearly triple what most hot street tunes require. That means no more pressure drop-offs, no more limited fueling, and no more watching power gains fall flat as soon as things get aggressive. Whether you’re racing, towing heavy, or just trying to build a truck that’s as capable as it is fast, this kit is built to feed your fuel-hungry setup.

Requires CP3 Pump

The kit doesn’t include the CP3 pump itself, which gives you the freedom to choose a pump that matches your goals—whether it’s a stock unit or an upgraded 10MM stroker. The brackets, lines, and fittings are all designed to bolt right in, and everything’s laid out to make the install as straightforward as possible. It's also compatible with lift pumps like FASS or AirDog, which we strongly recommend for proper filtration and long-term reliability.In short, if you're serious about power and tired of watching your rail pressure drop off when it matters most, this dual fueler kit is the upgrade your LML has been waiting for.

Fits: 2011, 2012, 2013, 2014 GM 6.6L Duramax

Application Notes:

• This kit does NOT include a CP3, you must provide your own. You MUST use a CP3 designed for a 6.7L Dodge Cummins
• This product will NOT work with trucks that have dual alternators. The H&S Motorsports CP3 pump is mounted where a dual alternator would be located.
• This product may not work with the EGR cooler installed. It may need to be removed.
• This product MUST be used in conjunction with custom tuning calibrations. Failure to install the correct calibrations can result in engine damage.