{"product_id":"magnum-4-000-stroke-crankshaft","title":"Magnum 4.000\" Stroke Crankshaft","description":"The Callies BBO42B-MG is a Big Block Chevy Magnum crankshaft designed for high-performance applications. Manufactured from ultra-pure AISI 4340 steel, this crankshaft undergoes multiple heat treatments, including Ultra Case Deep Nitride, to achieve unsurpassed wear and strength characteristics.\n\nKey specifications for this model include a 4.000-inch stroke, 2.750-inch main journal diameter, and 2.200-inch rod journal diameter. It is cammed for a 6.385-inch rod length. The design incorporates gun-drilled mains with eight full counterweights and lightened rod journals for optimized material distribution. Additional features include dual post keyways and enhanced rod oiling through main bearing oil hole lead-ins.\n\nThe Magnum crankshaft series from Callies offers a stroke range from 3.500 inches to 5.750 inches, accommodating various engine builds. This particular crankshaft is available with one and two-piece seal type flanges or a star flange, with custom flange bolt, dowel, and post drilling also being available options.","brand":"Callies","offers":[{"title":"Default Title","offer_id":52687310258488,"sku":"BBO42B-MG","price":3063.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/661666737.jpg?v=1784882484","url":"https:\/\/store.motormia.co\/products\/magnum-4-000-stroke-crankshaft","provider":"MOTORMIA","version":"1.0","type":"link"}