{"product_id":"3xl-racing-4-pin-two-piece-crank-hub","title":"4-PIN Two Piece Crank hub For BMW S55 Engine","description":"\u003ch2 data-section-id=\"1sj09px\" data-start=\"157\" data-end=\"206\"\u003e3XL Racing Two-Piece 4-Pin Crank Hub – BMW S55\u003c\/h2\u003e\n\u003cp data-start=\"208\" data-end=\"375\"\u003eThe \u003cstrong data-start=\"212\" data-end=\"252\"\u003e3XL Racing Two-Piece 4-Pin Crank Hub\u003c\/strong\u003e is engineered to eliminate crank hub slip while maintaining installation flexibility for high-performance BMW S55 engines.\u003c\/p\u003e\n\u003cp data-start=\"377\" data-end=\"614\"\u003eBy combining a precision \u003cstrong data-start=\"402\" data-end=\"428\"\u003etwo-piece architecture\u003c\/strong\u003e with a \u003cstrong data-start=\"436\" data-end=\"475\"\u003emechanically locked 4-pin interface\u003c\/strong\u003e, this system reduces tolerance stack-up during installation while maintaining high torque capacity for modified and high-boost S55 builds.\u003c\/p\u003e\n\u003chr data-start=\"616\" data-end=\"619\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"621\" data-end=\"636\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"638\" data-end=\"1050\"\u003e\n\u003cli data-section-id=\"rbsg9y\" data-start=\"638\" data-end=\"689\"\u003eTwo-piece crank hub design for easier alignment\u003c\/li\u003e\n\u003cli data-section-id=\"flpkre\" data-start=\"690\" data-end=\"735\"\u003e4-pin mechanical anti-slip locking system\u003c\/li\u003e\n\u003cli data-section-id=\"121lr06\" data-start=\"736\" data-end=\"790\"\u003eBillet 4340 high-strength alloy steel construction\u003c\/li\u003e\n\u003cli data-section-id=\"1stlcvi\" data-start=\"791\" data-end=\"842\"\u003eNitro-conditioned surface treatment (HRC 55–58)\u003c\/li\u003e\n\u003cli data-section-id=\"172uemg\" data-start=\"843\" data-end=\"887\"\u003ePrecision CNC machined for exact fitment\u003c\/li\u003e\n\u003cli data-section-id=\"2djsrz\" data-start=\"888\" data-end=\"946\"\u003eCapture plate with toothed self-locking bolts included\u003c\/li\u003e\n\u003cli data-section-id=\"8zg972\" data-start=\"947\" data-end=\"1006\"\u003ePrecision drill jig included for accurate pin placement\u003c\/li\u003e\n\u003cli data-section-id=\"1dkyvd5\" data-start=\"1007\" data-end=\"1050\"\u003eDesigned for high-horsepower S55 builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1052\" data-end=\"1055\"\u003e\n\u003ch2 data-section-id=\"svhvib\" data-start=\"1057\" data-end=\"1089\"\u003eWhat Problem Does This Solve?\u003c\/h2\u003e\n\u003cp data-start=\"1091\" data-end=\"1221\"\u003eThe factory BMW S55 crank hub relies primarily on \u003cstrong data-start=\"1141\" data-end=\"1170\"\u003efriction and bolt preload\u003c\/strong\u003e. Under increased torque loads, this may result in:\u003c\/p\u003e\n\u003cul data-start=\"1223\" data-end=\"1327\"\u003e\n\u003cli data-section-id=\"3ucwgm\" data-start=\"1223\" data-end=\"1245\"\u003eCrank hub rotation\u003c\/li\u003e\n\u003cli data-section-id=\"tca2ou\" data-start=\"1246\" data-end=\"1261\"\u003eTiming slip\u003c\/li\u003e\n\u003cli data-section-id=\"1xxfs2m\" data-start=\"1262\" data-end=\"1301\"\u003eCrank bolt loosening due to fatigue\u003c\/li\u003e\n\u003cli data-section-id=\"170vely\" data-start=\"1302\" data-end=\"1327\"\u003eEngine timing failure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1329\" data-end=\"1480\"\u003eThe \u003cstrong data-start=\"1333\" data-end=\"1366\"\u003e3XL Racing two-piece solution\u003c\/strong\u003e replaces friction-only retention with a \u003cstrong data-start=\"1407\" data-end=\"1451\"\u003emechanically pinned crankshaft interface\u003c\/strong\u003e, preventing rotational slip.\u003c\/p\u003e\n\u003chr data-start=\"1482\" data-end=\"1485\"\u003e\n\u003ch2 data-section-id=\"f0qyku\" data-start=\"1487\" data-end=\"1508\"\u003eEngineering Design\u003c\/h2\u003e\n\u003ch3 data-section-id=\"2kg1uo\" data-start=\"1510\" data-end=\"1536\"\u003eTwo-Piece Construction\u003c\/h3\u003e\n\u003cul data-start=\"1538\" data-end=\"1706\"\u003e\n\u003cli data-section-id=\"gj17j4\" data-start=\"1538\" data-end=\"1575\"\u003eImproves installation flexibility\u003c\/li\u003e\n\u003cli data-section-id=\"rr5x7k\" data-start=\"1576\" data-end=\"1608\"\u003eReduces alignment complexity\u003c\/li\u003e\n\u003cli data-section-id=\"1p029wn\" data-start=\"1609\" data-end=\"1651\"\u003eMaintains precise sprocket positioning\u003c\/li\u003e\n\u003cli data-section-id=\"1hh8oix\" data-start=\"1652\" data-end=\"1706\"\u003eEnhances serviceability compared to one-piece hubs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"qhw6v7\" data-start=\"1708\" data-end=\"1734\"\u003e4-Pin Anti-Slip Design\u003c\/h3\u003e\n\u003cul data-start=\"1736\" data-end=\"1870\"\u003e\n\u003cli data-section-id=\"1c22ghb\" data-start=\"1736\" data-end=\"1777\"\u003eBalanced rotational load distribution\u003c\/li\u003e\n\u003cli data-section-id=\"n67sw1\" data-start=\"1778\" data-end=\"1809\"\u003eRedundant locking structure\u003c\/li\u003e\n\u003cli data-section-id=\"bq1oyi\" data-start=\"1810\" data-end=\"1870\"\u003ePrecision dowel pin interface between crankshaft and hub\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"s73r5v\" data-start=\"1872\" data-end=\"1901\"\u003eMechanical Locking System\u003c\/h3\u003e\n\u003cul data-start=\"1903\" data-end=\"2053\"\u003e\n\u003cli data-section-id=\"nrkyhc\" data-start=\"1903\" data-end=\"1954\"\u003eFour hardened dowel pins lock hub to crankshaft\u003c\/li\u003e\n\u003cli data-section-id=\"7dnqll\" data-start=\"1955\" data-end=\"2001\"\u003eCapture plate prevents crank bolt rotation\u003c\/li\u003e\n\u003cli data-section-id=\"129g1bs\" data-start=\"2002\" data-end=\"2053\"\u003eToothed self-locking hardware ensures retention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2055\" data-end=\"2058\"\u003e\n\u003ch2 data-section-id=\"juhx4r\" data-start=\"2060\" data-end=\"2088\"\u003eMaterials \u0026amp; Manufacturing\u003c\/h2\u003e\n\u003cul data-start=\"2090\" data-end=\"2250\"\u003e\n\u003cli data-section-id=\"lvskow\" data-start=\"2090\" data-end=\"2134\"\u003eMaterial: 4340 High-Strength Alloy Steel\u003c\/li\u003e\n\u003cli data-section-id=\"4xyphn\" data-start=\"2135\" data-end=\"2176\"\u003eManufacturing: Precision CNC Machined\u003c\/li\u003e\n\u003cli data-section-id=\"1nwwtge\" data-start=\"2177\" data-end=\"2218\"\u003eSurface Treatment: Nitro Conditioning\u003c\/li\u003e\n\u003cli data-section-id=\"hrjzsk\" data-start=\"2219\" data-end=\"2250\"\u003eSurface Hardness: HRC 55–58\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2252\" data-end=\"2255\"\u003e\n\u003ch2 data-section-id=\"1ae01cs\" data-start=\"2257\" data-end=\"2272\"\u003eKit Includes\u003c\/h2\u003e\n\u003cul data-start=\"2274\" data-end=\"2413\"\u003e\n\u003cli data-section-id=\"u8sqlj\" data-start=\"2274\" data-end=\"2306\"\u003eTwo-piece crank hub assembly\u003c\/li\u003e\n\u003cli data-section-id=\"s3iwc\" data-start=\"2307\" data-end=\"2330\"\u003eHardened dowel pins\u003c\/li\u003e\n\u003cli data-section-id=\"1cnviud\" data-start=\"2331\" data-end=\"2354\"\u003ePrecision drill jig\u003c\/li\u003e\n\u003cli data-section-id=\"o19u2o\" data-start=\"2355\" data-end=\"2372\"\u003eCapture plate\u003c\/li\u003e\n\u003cli data-section-id=\"homwdk\" data-start=\"2373\" data-end=\"2387\"\u003eCrank bolt\u003c\/li\u003e\n\u003cli data-section-id=\"139hnd6\" data-start=\"2388\" data-end=\"2413\"\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2415\" data-end=\"2418\"\u003e\n\u003ch2 data-section-id=\"1hhgod1\" data-start=\"2420\" data-end=\"2447\"\u003eInstallation Information\u003c\/h2\u003e\n\u003cul data-start=\"2449\" data-end=\"2615\"\u003e\n\u003cli data-section-id=\"1ng73kq\" data-start=\"2449\" data-end=\"2480\"\u003eEngine removal required: No\u003c\/li\u003e\n\u003cli data-section-id=\"19x99jk\" data-start=\"2481\" data-end=\"2523\"\u003eProfessional installation: Recommended\u003c\/li\u003e\n\u003cli data-section-id=\"ulfu9r\" data-start=\"2524\" data-end=\"2575\"\u003eSpecial tools required: Crankshaft locking tool\u003c\/li\u003e\n\u003cli data-section-id=\"j08th7\" data-start=\"2576\" data-end=\"2615\"\u003eEstimated install time: 18–24 hours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2617\" data-end=\"2642\"\u003e\u003cstrong data-start=\"2617\" data-end=\"2642\"\u003eTorque Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2644\" data-end=\"2707\"\u003e\n\u003cli data-section-id=\"kebfe6\" data-start=\"2644\" data-end=\"2672\"\u003eCrank bolt: 100Nm + 270°\u003c\/li\u003e\n\u003cli data-section-id=\"j8knvd\" data-start=\"2673\" data-end=\"2707\"\u003eCapture plate bolts: 25 ft-lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2709\" data-end=\"2712\"\u003e\n\u003ch2 data-section-id=\"nx97cd\" data-start=\"2714\" data-end=\"2729\"\u003eDesigned For\u003c\/h2\u003e\n\u003cul data-start=\"2731\" data-end=\"2858\"\u003e\n\u003cli data-section-id=\"wur5ck\" data-start=\"2731\" data-end=\"2760\"\u003eStreet performance builds\u003c\/li\u003e\n\u003cli data-section-id=\"1a46mzo\" data-start=\"2761\" data-end=\"2774\"\u003eTrack use\u003c\/li\u003e\n\u003cli data-section-id=\"nv4vxm\" data-start=\"2775\" data-end=\"2802\"\u003eHigh boost applications\u003c\/li\u003e\n\u003cli data-section-id=\"qz7wlv\" data-start=\"2803\" data-end=\"2820\"\u003eBuilt engines\u003c\/li\u003e\n\u003cli data-section-id=\"das7xv\" data-start=\"2821\" data-end=\"2858\"\u003eUp to 700 HP setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2860\" data-end=\"2863\"\u003e\n\u003ch2 data-section-id=\"iykr96\" data-start=\"2865\" data-end=\"2883\"\u003eCompared to OEM\u003c\/h2\u003e\n\u003cul data-start=\"2885\" data-end=\"3021\"\u003e\n\u003cli data-section-id=\"13li77\" data-start=\"2885\" data-end=\"2920\"\u003eMechanical 4-pin locking system\u003c\/li\u003e\n\u003cli data-section-id=\"1acwii6\" data-start=\"2921\" data-end=\"2959\"\u003eEliminates friction-only retention\u003c\/li\u003e\n\u003cli data-section-id=\"fryzhf\" data-start=\"2960\" data-end=\"2989\"\u003eImproved timing stability\u003c\/li\u003e\n\u003cli data-section-id=\"1706o8z\" data-start=\"2990\" data-end=\"3021\"\u003eReduced crank hub slip risk\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3023\" data-end=\"3026\"\u003e\n\u003ch2 data-section-id=\"10ekyi7\" data-start=\"3028\" data-end=\"3060\"\u003eCompared to One-Piece Designs\u003c\/h2\u003e\n\u003cul data-start=\"3062\" data-end=\"3208\"\u003e\n\u003cli data-section-id=\"1hrc0gy\" data-start=\"3062\" data-end=\"3095\"\u003eEasier installation alignment\u003c\/li\u003e\n\u003cli data-section-id=\"864tux\" data-start=\"3096\" data-end=\"3123\"\u003eImproved serviceability\u003c\/li\u003e\n\u003cli data-section-id=\"1bpst5g\" data-start=\"3124\" data-end=\"3159\"\u003eReduced installation complexity\u003c\/li\u003e\n\u003cli data-section-id=\"1279bwj\" data-start=\"3160\" data-end=\"3208\"\u003eSame locking strength with added flexibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3210\" data-end=\"3213\"\u003e\n\u003ch2 data-section-id=\"fgfv49\" data-start=\"3215\" data-end=\"3254\"\u003eCompared to Friction-Based Solutions\u003c\/h2\u003e\n\u003cul data-start=\"3256\" data-end=\"3359\"\u003e\n\u003cli data-section-id=\"v5ppbo\" data-start=\"3256\" data-end=\"3289\"\u003eNo relative rotation possible\u003c\/li\u003e\n\u003cli data-section-id=\"1qjnxt9\" data-start=\"3290\" data-end=\"3316\"\u003eHigher torque capacity\u003c\/li\u003e\n\u003cli data-section-id=\"1vvt6xc\" data-start=\"3317\" data-end=\"3359\"\u003eEliminates spun crank hub failure mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3361\" data-end=\"3364\"\u003e\n\u003ch2 data-section-id=\"1lml4vy\" data-start=\"3366\" data-end=\"3389\"\u003eTesting \u0026amp; Validation\u003c\/h2\u003e\n\u003cul data-start=\"3391\" data-end=\"3521\"\u003e\n\u003cli data-section-id=\"arhywn\" data-start=\"3391\" data-end=\"3425\"\u003e50,000 km test vehicle mileage\u003c\/li\u003e\n\u003cli data-section-id=\"13dtt3a\" data-start=\"3426\" data-end=\"3460\"\u003eTear-down inspection completed\u003c\/li\u003e\n\u003cli data-section-id=\"140x8zq\" data-start=\"3461\" data-end=\"3490\"\u003eNo abnormal wear observed\u003c\/li\u003e\n\u003cli data-section-id=\"iehwmu\" data-start=\"3491\" data-end=\"3521\"\u003eOngoing durability testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3523\" data-end=\"3526\"\u003e\n\u003ch2 data-section-id=\"16q3upg\" data-start=\"3528\" data-end=\"3546\"\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cul data-start=\"3548\" data-end=\"3643\"\u003e\n\u003cli data-section-id=\"16k3aya\" data-start=\"3548\" data-end=\"3568\"\u003eBMW F80 M3 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"yciq7r\" data-start=\"3569\" data-end=\"3589\"\u003eBMW F82 M4 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"rcfivq\" data-start=\"3590\" data-end=\"3610\"\u003eBMW F83 M4 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"7zrrdt\" data-start=\"3611\" data-end=\"3643\"\u003eBMW F87 M2 Competition (S55)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3645\" data-end=\"3648\"\u003e\n\u003ch2 data-section-id=\"1k5q749\" data-start=\"3650\" data-end=\"3660\"\u003eSummary\u003c\/h2\u003e\n\u003cp data-start=\"3662\" data-end=\"3890\"\u003eThe \u003cstrong data-start=\"3666\" data-end=\"3706\"\u003e3XL Racing Two-Piece 4-Pin Crank Hub\u003c\/strong\u003e combines installation flexibility with a mechanically locked anti-slip design, making it ideal for modified S55 engines requiring reliable timing retention and high torque capability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"3XL RACING","offers":[{"title":"Default Title","offer_id":55480527749193,"sku":null,"price":1399.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/3980\/2697\/files\/7_db787be5-0f76-4106-a293-c1281c0762d3.jpg?v=1771462207","url":"https:\/\/jcseuroparts.com\/products\/3xl-racing-4-pin-two-piece-crank-hub","provider":"JCS Euro Parts","version":"1.0","type":"link"}