{"product_id":"compstar-4340-forged-crankshaft","title":"Compstar 4340 Forged Crankshaft","description":"The Callies Compstar LS 5.3L 363 stroker rotating assembly kit (CS-5300-CP) is engineered for high-performance engine builds, capable of supporting up to 1400 horsepower.\n\nThis kit includes a robust Callies Compstar 4340 forged steel crankshaft with a 4.000-inch stroke and 8 fully counterweighted for optimal bearing load distribution. Complementing the crankshaft are Callies Compstar forged 4340 steel H-beam connecting rods, secured with 7\/16-inch ARP 2000 rod bolts. The assembly features CP Bullet 2618 forged dish pistons with .180 wall wrist pins, designed to fit 15-degree LS heads, and CP performance piston rings with 3.0mm oil rings. High-performance H-series main and rod bearings are also included.\n\nThe rotating assembly is internally balanced in-house by CNC-Motorsports, ensuring a balanced and smooth operation. When paired with a 62cc cylinder head, this kit achieves a 9.5:1 compression ratio. This assembly is specifically designed to fit GEN III and GEN IV LS engines, including 4.8L LR4, LY2, L20, and 5.3L Vortec 5300, LM7, L59, LM4, LMF, LH6, LY5, LMG, LC9, LH8, and LH9 variants.\n\nOptional upgrades include Compstar Xtreme Duty H Beam Rods or Boostline Rods for extreme engine builds. For higher horsepower applications or specific needs, contacting CNC-Motorsports for alternative kit options is recommended.","brand":"Callies Performance Products","offers":[{"title":"Default Title","offer_id":52687310291256,"sku":"CS-5300-CP","price":3363.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660190686.jpg?v=1784882484","url":"https:\/\/store.motormia.co\/products\/compstar-4340-forged-crankshaft","provider":"MOTORMIA","version":"1.0","type":"link"}