{"product_id":"fleece-performance-fleece-performance-performance-cp3k-for-5-9l-cummins-cumm-cp3k-5-9","title":"Fleece Performance CP3K for 5.9L Cummins Diesel Fuel Pump Upgrade Eliminates 3000 RPM Flow Restriction","description":"\u003cdiv\u003e\n\u003cp\u003eUpgrade the fuel delivery on your 5.9L Cummins with the Fleece Performance CP3K for 5.9L Cummins (CUMM-CP3K-5.9). This is a purpose-built modification that repurposes a 6.7L CP3 core to eliminate the factory fuel flow restriction that kicks in around 3,000 RPM, a common pain point for stock CP3 setups on engines used beyond stock power levels.\u003c\/p\u003e \u003cp\u003eWhy this matters: when you push past 3,000 RPM, a stock CP3 can lose fuel flow and rail pressure, leading to a noticeable dip in horsepower right when you’re demanding peak performance. The CP3K maintains consistent fuel rail pressure across the entire RPM range, ensuring your Cummins can respond with clean, reliable power when you need it most—whether you’re towing heavy, accelerating out of a corner, or chasing peak power on the track.\u003c\/p\u003e \u003ch3\u003eWhat’s in the kit\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eBrand new 6.7L Cummins CP3 pump\u003c\/li\u003e \u003cli\u003e1\/2\" CP3 feed fitting\u003c\/li\u003e \u003cli\u003e3\/8\" CP3 feed fitting\u003c\/li\u003e \u003cli\u003e6.7L CP3 to 5.9 high-pressure rail line\u003c\/li\u003e \u003cli\u003e3\/8\" fuel line and hose clamps\u003c\/li\u003e \u003cli\u003eBrand-new Bosch CP3 core with no core charge\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey benefits that set CP3K apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eConsistent fuel rail pressure\u003c\/strong\u003e across the full RPM range, reducing horsepower loss at higher engine speeds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDirect, bolt-in upgrade\u003c\/strong\u003e designed to integrate with the 5.9L Cummins platform without extensive fabrication.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eImproved fuel flow\u003c\/strong\u003e compared to a stock CP3, enabling more reliable performance under boost, load, and hard acceleration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQuality you can trust\u003c\/strong\u003e with a brand-new Bosch CP3 component and a purpose-built connection to the 5.9L rail.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNo core charge\u003c\/strong\u003e and a straightforward warranty path for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal for\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e2003–2007 Dodge Ram 2500\/3500 5.9L 24V Cummins owners looking to unlock higher RPM performance\u003c\/li\u003e \u003cli\u003eDiesel enthusiasts seeking dependable fuel delivery during towing, hauling, or off-road use\u003c\/li\u003e \u003cli\u003eBuilders and racers who want a reliable upgrade path without replacing the entire fuel system\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eThe CP3K is designed to replace the stock CP3 with minimal modification, delivering a seamless upgrade in fuel delivery.\u003c\/li\u003e \u003cli\u003ePairing this upgrade with supporting fuel and air handling improvements can maximize the benefits, especially under boost or heavy load.\u003c\/li\u003e \u003cli\u003eInstall with attention to the new feed fittings and high-pressure rail line connections to ensure consistent sealing and pressure delivery.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e includes a 1-year limited parts warranty for confidence in your investment.\u003c\/p\u003e \u003cp\u003eWith the Fleece Performance CP3K for 5.9L Cummins, you’re choosing a targeted, performance-driven solution that addresses the specific RPM-related fuel flow limitation of the 5.9L platform. It’s the practical upgrade for drivers who demand consistent power from redline to highway, without the guesswork of how your fuel system will respond under real-world driving conditions.\u003c\/p\u003e \u003cbr\u003e \u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":54098422858003,"sku":"FLCFPE-CUMM-CP3K-5.9","price":1449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/0218\/3187\/files\/FPE-CUMM-CP3K-5.9.jpg?v=1777603337","url":"https:\/\/urban3dllc.com\/products\/fleece-performance-fleece-performance-performance-cp3k-for-5-9l-cummins-cumm-cp3k-5-9","provider":"Urban 3D","version":"1.0","type":"link"}