{"product_id":"fleece-performance-duramax-cp3k-lbzlmm-based-dmax-cp3k","title":"Fleece Performance Duramax CP3K LBZLMM Based Upgrade Eliminates Fuel Flow Restriction After 3000 RPM","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eUnleash sustained fuel delivery in your Duramax with the Fleece CP3K\u003c\/strong\u003e—a purpose-built upgrade that removes the factory 3,000 RPM fuel-flow restriction and keeps your engine pulling hard when you need it most.\u003c\/p\u003e \u003cp\u003eThe CP3K is a meticulously engineered modification of the Duramax LBZ CP3, built around a brand-new Bosch CP3 core. By eliminating the stock pump’s fuel flow and rail pressure drop after the 3,000 RPM mark, this upgrade preserves your desired fuel rail pressure across the entire RPM band. The result? More consistent horsepower and confident power delivery when you’re towing, climbing grades, or hammering the throttle at higher RPMs.\u003c\/p\u003e \u003ch3\u003eKey benefits that matter on the road and track\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintains fuel rail pressure through the full RPM range, reducing power drop during high-demand moments\u003c\/li\u003e \u003cli\u003eSharper throttle response and more reliable high-end performance for tuned Duramaxes\u003c\/li\u003e \u003cli\u003eBrand new Bosch CP3 core with no core charge, simplifying the upgrade path\u003c\/li\u003e \u003cli\u003eCost-effective, high-impact upgrade that complements existing fuel systems and lift pumps\u003c\/li\u003e \u003cli\u003eDesigned specifically to integrate with Duramax engines across multiple generations\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eApplication notes and installation considerations\u003c\/h3\u003e\n\u003cp\u003eThe CP3K is designed to fit a broad range of Duramax platforms. For 2001–2005 models (LB7 or LLY), the fuel pressure regulator requires appropriate scaling. Our application notes provide the necessary scaling values for these early trucks to ensure proper operation. This attention to regulator behavior is what keeps fuel delivery accurate across RPMs, rather than just delivering more fuel overall.\u003c\/p\u003e \u003ch3\u003eCompatibility and fitment\u003c\/h3\u003e\n\u003cp\u003eFits GM Duramax diesel pickups and SUVs spanning 2001 through 2016, covering the following generations and configurations: LB7, LLY, LBZ, LMM, and LML variants. The CP3K is designed to align with the LBZ-LMM based architecture, delivering a robust upgrade path whether you’re running stock fueling or a tuned setup.\u003c\/p\u003e \u003ch3\u003eWho should consider the CP3K\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eOwners pursuing steady, high‑rpm power without fuel starvation\u003c\/li\u003e \u003cli\u003eEnthusiasts building tuned or high‑flow Duramax setups who want reliable rail pressure at all throttle positions\u003c\/li\u003e \u003cli\u003eTrailers and heavy‑haul drivers who need consistent performance under load\u003c\/li\u003e \u003cli\u003eShop technicians seeking a proven, no‑core‑charge CP3 upgrade with strong field support\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWarranty and confidence\u003c\/h3\u003e\n\u003cp\u003eThis product comes with a 1 Year Limited Parts Warranty, reflecting the build quality and durability you expect from Fleece Performance.\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":54098423415059,"sku":"FLCFPE-DMAX-CP3K","price":1349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/0218\/3187\/files\/FPE-DMAX-CP3K.jpg?v=1777603337","url":"https:\/\/urban3dllc.com\/products\/fleece-performance-duramax-cp3k-lbzlmm-based-dmax-cp3k","provider":"Urban 3D","version":"1.0","type":"link"}