{"product_id":"ls-full-billet-counterweight-4-inch-crank","title":"Spool GM LS V8 Billet 4340 Full Counterweight 4\" Stroke Crankshaft","description":"\u003ch3\u003e\u003cstrong\u003eSpool Full Billet 4340 Full Counterweight LS 4\" Stroke Crankshaft\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp\u003eThe Spool \u003cstrong\u003e4.000” stroke LS crankshaft\u003c\/strong\u003e is manufactured from \u003cstrong\u003e4340 billet steel\u003c\/strong\u003e, providing exceptional strength and durability for high-performance applications. Designed with \u003cstrong\u003efull counterweights\u003c\/strong\u003e, this crankshaft improves rotational balance, reduces crankshaft flex, and enhances main bearing longevity under high RPM and extreme loads.\u003c\/p\u003e\r\n\u003cp\u003eKey specifications:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 4340 Billet Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eStroke\u003c\/strong\u003e: 4.000”\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eCounterweight Design\u003c\/strong\u003e: Full counterweight for improved balance and reduced stress\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eMain Journal Size\u003c\/strong\u003e: Standard LS\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eRod Journal Size\u003c\/strong\u003e: Standard LS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003eThis crankshaft is precision-machined and finished to exact tolerances, making it suitable for \u003cstrong\u003ehigh-horsepower street, drag racing, and endurance applications\u003c\/strong\u003e.\u003c\/p\u003e\r\n\u003cp\u003e\u003cem\u003eNote: Crank does not come with reluctor\u003c\/em\u003e\u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003eNote: \u003cstrong\u003eClearancing of a stock cylinder block to make space for the counterweights is required.\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\u003ch2\u003eAvailable options\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eReluctor Wheel Option: No Reluctor wheel; Genuine GM LS 24 tooth Reluctor Wheel; Genuine GM LS 58 tooth Reluctor Wheel\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eEngine build fitment\u003c\/h2\u003e\u003cp\u003eGM \/ LS|LS 5.7L and 6.0L V8. Match the selected dimensions, engine generation and rotating assembly specification before machining or assembly.\u003c\/p\u003e\u003ch2\u003eInstallation and BBT workshop support\u003c\/h2\u003e\u003cp\u003eMeasure journal and thrust clearances, check block clearance and balance the complete rotating assembly. Confirm the damper, crank trigger and flywheel arrangement with your engine builder.\u003c\/p\u003e\u003cp\u003eBuilt by Boost \u0026amp; Tune is an authorised Spool Imports dealer and can assist with component selection, engine assembly and tuning requirements for your build.\u003c\/p\u003e\u003ch2\u003eRelated supporting parts\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/spool-ls-holden-gm-ls-5-7-and-6-litre-v8-x300-extreme-300m-conrods\"\u003eSpool LS Holden \/ GM LS 5.7 and 6 Litre V8 X300 Extreme 300M Conrods\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eConfirm the supporting part matches your selected build specification.\u003c\/p\u003e","brand":"Spool","offers":[{"title":"No Reluctor wheel","offer_id":67602699092035,"sku":"BBT-SP-419F64BB3E1A5F6D","price":4750.0,"currency_code":"AUD","in_stock":true},{"title":"Genuine GM LS 58 tooth Reluctor Wheel","offer_id":67602699124803,"sku":"BBT-SP-C4EF30D2898C4A8C","price":4811.5,"currency_code":"AUD","in_stock":true},{"title":"Genuine GM LS 24 tooth Reluctor Wheel","offer_id":67602699157571,"sku":"BBT-SP-F6CE5DFD0B8B6D27","price":4904.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/spool-4b7f335a4dad-ls-billet-full-counterweight-web_75e0b05c-5072-4368-bb4c-17c7841323ec.png?v=1790919027","url":"https:\/\/builtbyboostandtune.com.au\/products\/ls-full-billet-counterweight-4-inch-crank","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}