{"product_id":"forged-4340-crankshaft-4-000-inch-stroke-2-piece-rear-main-seal","title":"Forged 4340 Crankshaft, 4.000-Inch Stroke, 2-Piece Rear Main Seal","description":"The Eagle Specialty Products EAG436040006123 is a forged 4340 chromoly steel crankshaft engineered for demanding, high-performance engine builds. This crankshaft is designed with a 4.000-inch stroke and internal balancing, suitable for engines with a 2-piece rear main seal configuration. It is specifically intended for stroker applications and requires machining to the engine block for clearance.\n\nConstructed from non-twist forged 4340 steel, this crankshaft undergoes a rigorous multi-stage heat-treatment process, followed by stress-relieving and shot-peening for exceptional durability. Each unit is subjected to X-ray, magnaflux, and sonic testing to ensure top-tier quality and structural integrity. Enhancements include chamfered oil holes for superior lubrication, a .125-inch radius on rod and main journals to bolster strength, and precision-ground, micro-polished journals that achieve a surface finish of less than 5 R.A. The crankshaft also features a tight target bob weight of +\/- 2 percent, significantly minimizing balancing labor.\n\nImportant considerations for installation include the mandatory use of chamfered bearings and the necessity for block machining to accommodate the crankshaft. This component is not intended for use in pollution-controlled vehicles.","brand":"Eagle Specialty Products","offers":[{"title":"Default Title","offer_id":52872905163064,"sku":"EAG436040006123","price":1209.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/store.motormia.co\/products\/forged-4340-crankshaft-4-000-inch-stroke-2-piece-rear-main-seal","provider":"MOTORMIA","version":"1.0","type":"link"}