Exergy E04-10209 14mm Stroker CP3 Pump | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Features:

• Fits 2004.5–2005 LLY Duramax engines
• 14mm stroker CP3 for increased fuel flow
• Supports high-horsepower diesel builds
• Delivers consistent fuel under heavy load
• Precision-built for top-tier performance
• Ideal for competition or towing setups
• Tested using industry-leading equipment
• Engineered by diesel fuel system experts
• Improves fuel delivery and throttle response
• Backed by Exergy's proven performance reputation

Built for Power, Tuned for Precision

If you're pushing your 2004.5 to 2005 LLY Duramax well beyond stock limits, you're going to need a fuel system that can keep up. The Exergy E04-10209 14mm Stroker CP3 Pump is built to do just that. With a larger 14mm stroke, this CP3 pump moves significantly more fuel than stock, which means it delivers the volume and pressure needed to support higher horsepower applications. Whether you’re running bigger injectors, compound turbos, or both, this pump ensures your engine gets the fuel it demands, without pressure drop or lag. It’s the kind of upgrade that makes a noticeable difference in throttle response, mid-range pull, and overall drivability under load.

Designed by Experts, Proven on the Track

What sets Exergy apart is the level of engineering and testing behind each pump. This isn’t mass-produced hardware—it’s a precision-built piece developed by a team that’s been immersed in high-performance diesel fuel systems for decades. Each unit is assembled using some of the most advanced calibration and flow-testing equipment in the industry. That kind of attention to detail shows up in real-world results, whether you're chasing trophies at the track or simply want reliable, consistent power for towing or off-road use. Backed by Exergy’s reputation for unmatched quality, this stroker CP3 is a must-have for anyone serious about turning their LLY into a true performance machine.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY