{"product_id":"cep67cld1924","title":"6.7L Long Block Daily Driver 2021-2024 Cummins Engine","description":"\u003ch4\u003e\u003cem\u003eCall for availability and pricing\u003c\/em\u003e\u003c\/h4\u003e\n\u003ch3\u003eKey Features and Fixes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrades Over the Model C:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eRear Main Seal and Housing\u003c\/li\u003e\n\u003cli\u003eFront Gear Housing\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Performance \u0026amp; Power\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRated for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e500+ HP\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecapability, delivering significant power over stock for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Balanced Rotating Assembly:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePrecision-balanced components ensure smooth, vibration-free operation and extended bearing life at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReliability \u0026amp; Durability Upgrades\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Pistons:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUpgraded pistons that are inherently stronger and designed for more robust commercial applications. This solves the OEM issue of weak pistons that are prone to cracking under heat and boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valve Integrity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures all-new, upgraded material valves that eliminate the high-heat separation common in OEM exhaust valves, preventing compression loss and piston-to-valve contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eMachining Process:\u003c\/h3\u003e\n\u003cp\u003eChoate Engineering Performance doesn’t just rebuild engines - we remanufacture them. Each of our engines undergoes extensive, precision machine work to correct OEM flaws and ensure durability and reliability.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Block Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Machining:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eOur cylinder heads are fully machined and enhanced in-house to improve airflow and reliability. Each head is first magnafluxed and pressure tested to ensure they are free of any cracks or leaks. The surface is then precision decked to an extremely smooth finish, guaranteeing the necessary flatness for a perfect seal with MLS head gaskets. Internally, the valve seats are machined to optimize airflow and prevent common failures, and the entire valve train geometry is blueprinted to specific tolerances to reduce lifter preload and prolong component life.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eRotational Assembly Balancing:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComponents and Parts:\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eEngine Core Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003eCrankshaft\u003c\/li\u003e\n\u003cli\u003eSteel Connecting Rods\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003eNew Pistons\u003c\/li\u003e\n\u003cli\u003eReman Cylinder Head\u003c\/li\u003e\n\u003cli\u003ePushrods\u003c\/li\u003e\n\u003cli\u003eNew Main Bearings\u003c\/li\u003e\n\u003cli\u003eNew Rod Bearings\u003c\/li\u003e\n\u003cli\u003eNew Cam Bearings\u003c\/li\u003e\n\u003cli\u003eMain Bolts\u003c\/li\u003e\n\u003cli\u003eHead Studs\u003c\/li\u003e\n\u003cli\u003eRockers\u003c\/li\u003e\n\u003cli\u003eBillet Freeze Plugs\u003c\/li\u003e\n\u003cli\u003eNew Oil Pump\u003c\/li\u003e\n\u003cli\u003eUpper Oil Pan\u003c\/li\u003e\n\u003cli\u003eLower Oil Pan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eGaskets and Seals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNew Head Gaskets\u003c\/li\u003e\n\u003cli\u003eRear Main Seal and Housing\u003c\/li\u003e\n\u003cli\u003eFront Gear Housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eCylinder Head Components\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003eNew Valve Guides\u003c\/li\u003e\n\u003cli\u003eNew Socket Plug\u003c\/li\u003e\n\u003cli\u003eNew Oversized Valve Seats\u003c\/li\u003e\n\u003cli\u003eNew Threaded Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"Choate Performance","offers":[{"title":"Default Title","offer_id":51196642361628,"sku":"CEP67CLD2124","price":13500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0092\/1619\/6665\/files\/CEP67CLD1924-KLZM.jpg?v=1738707529","url":"https:\/\/holdersdiesel.com\/products\/cep67cld1924","provider":"Holders Diesel Performance","version":"1.0","type":"link"}