Exergy E04-10504 Improved Stock CP4 Pump | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Key Features: - OEM-Grade Improvements: Designed by engineers with prior Bosch experience; upgraded internals resolve the failure-prone issues in factory CP4 pumps. - Thoroughly Tested: Each unit is performance-tested from idle to full power using factory calibration points and additional performance-specific metrics. - Advanced Verification: Leveraging Bosch engineering-grade equipment, Exergy measures: - Injection quantity - Shot-to-shot consistency - Injection timing - Stand-Alone ECU & EFI Live Ready: Ideal for tuners and builders using stand-alone engine management systems or custom calibrations. Why Choose the Exergy Improved CP4? The OEM CP4 pump is a known weak link in the 2011–2016 Duramax LML platform, often leading to catastrophic fuel system damage upon failure. Exergy's Improved CP4 Pump eliminates that concern by focusing on precision manufacturing and scientific validation, giving you a safe, reliable alternative to an expensive fuel system overhaul. Whether you’re maintaining your truck’s emissions system for street use or building a performance platform, this pump delivers the perfect blend of factory fitment with engineered dependability. Fitment: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado 2500HD/3500HD & Sierra 2500HD/3500HD 6.6L Duramax LML Warranty & Compliance: - Warranty details provided directly by Exergy Performance - Designed as an emissions-compliant stock replacement (verify local regulations)