{"product_id":"sb-ford-4-125-bore-3-40-stroke-forged-piston-short-block-engine","title":"SB Ford 4.125\" Bore 3.40\" Stroke Forged Piston Short Block Engine","description":"The Dart CNC-9440-ED is a meticulously engineered short block engine built for SB Ford applications, offering a robust foundation for high-performance builds. This assembly showcases a Dart SHP block, paired with an Eagle 4340 forged steel crankshaft featuring a 3.400-inch stroke and internal balance. Supporting this are Eagle H-Beam connecting rods, measuring 5.400 inches in length and equipped with ARP 8740 bolts for enhanced durability.\n\nAt the heart of this short block are JE forged pistons, specifically designed with a -14cc dish to achieve a 4.125-inch bore. This configuration, along with high-performance plasma moly piston rings, ACL\/Clevite 77 rod and main bearings, Dura Bond cam bearings, a Dura Bond finishing kit, and brass freeze plugs, ensures optimal performance and longevity. The engine also includes a Victor rear main seal. The compression ratio is tailored to combustion chamber size, offering 10.4:1 with 56cc chambers, 9.9:1 with 60cc chambers, and the advertised 9.5:1 with 64cc chambers.\n\nEach short block is professionally machined, balanced, assembled, and blueprinted in-house by CNC-Motorsports, with a balance card and blueprint sheet provided to the customer. This attention to detail ensures that the short block meets race-winning specifications. The standard bore is maintained unless otherwise noted, and CNC-Motorsports offers custom build options to meet specific customer needs.","brand":"Dart","offers":[{"title":"Default Title","offer_id":52687588163896,"sku":"CNC-9440-ED","price":6650.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/662652985.jpg?v=1784885339","url":"https:\/\/store.motormia.co\/products\/sb-ford-4-125-bore-3-40-stroke-forged-piston-short-block-engine","provider":"MOTORMIA","version":"1.0","type":"link"}