{"product_id":"3xl-racing-4-pin-one-piece-crank-hub","title":"4-PIN One Piece Crank hub For BMW S55 Engine","description":"\u003ch2 data-section-id=\"1gcxrtp\" data-start=\"132\" data-end=\"181\"\u003e3XL Racing One-Piece 4-Pin Crank Hub – BMW S55\u003c\/h2\u003e\n\u003cp data-start=\"183\" data-end=\"338\"\u003eThe \u003cstrong data-start=\"187\" data-end=\"227\"\u003e3XL Racing One-Piece 4-Pin Crank Hub\u003c\/strong\u003e is engineered to eliminate crank hub slip and improve timing reliability for high-performance BMW S55 engines.\u003c\/p\u003e\n\u003cp data-start=\"340\" data-end=\"558\"\u003eBy using a \u003cstrong data-start=\"351\" data-end=\"384\"\u003eone-piece billet construction\u003c\/strong\u003e combined with a \u003cstrong data-start=\"401\" data-end=\"440\"\u003emechanically locked 4-pin interface\u003c\/strong\u003e, this design maximizes rigidity, reduces tolerance stack-up, and improves torque transfer under high-load conditions.\u003c\/p\u003e\n\u003chr data-start=\"560\" data-end=\"563\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"565\" data-end=\"580\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"582\" data-end=\"974\"\u003e\n\u003cli data-section-id=\"fvoqw3\" data-start=\"582\" data-end=\"612\"\u003eOne-piece crank hub design\u003c\/li\u003e\n\u003cli data-section-id=\"flpkre\" data-start=\"613\" data-end=\"658\"\u003e4-pin mechanical anti-slip locking system\u003c\/li\u003e\n\u003cli data-section-id=\"121lr06\" data-start=\"659\" data-end=\"713\"\u003eBillet 4340 high-strength alloy steel construction\u003c\/li\u003e\n\u003cli data-section-id=\"1stlcvi\" data-start=\"714\" data-end=\"765\"\u003eNitro-conditioned surface treatment (HRC 55–58)\u003c\/li\u003e\n\u003cli data-section-id=\"172uemg\" data-start=\"766\" data-end=\"810\"\u003ePrecision CNC machined for exact fitment\u003c\/li\u003e\n\u003cli data-section-id=\"2djsrz\" data-start=\"811\" data-end=\"869\"\u003eCapture plate with toothed self-locking bolts included\u003c\/li\u003e\n\u003cli data-section-id=\"8zg972\" data-start=\"870\" data-end=\"929\"\u003ePrecision drill jig included for accurate pin placement\u003c\/li\u003e\n\u003cli data-section-id=\"16iqwst\" data-start=\"930\" data-end=\"974\"\u003eDesigned for high-performance S55 builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"976\" data-end=\"979\"\u003e\n\u003ch2 data-section-id=\"svhvib\" data-start=\"981\" data-end=\"1013\"\u003eWhat Problem Does This Solve?\u003c\/h2\u003e\n\u003cp data-start=\"1015\" data-end=\"1145\"\u003eThe factory BMW S55 crank hub relies primarily on \u003cstrong data-start=\"1065\" data-end=\"1094\"\u003efriction and bolt preload\u003c\/strong\u003e. Under high torque conditions, this may result in:\u003c\/p\u003e\n\u003cul data-start=\"1147\" data-end=\"1251\"\u003e\n\u003cli data-section-id=\"3ucwgm\" data-start=\"1147\" data-end=\"1169\"\u003eCrank hub rotation\u003c\/li\u003e\n\u003cli data-section-id=\"tca2ou\" data-start=\"1170\" data-end=\"1185\"\u003eTiming slip\u003c\/li\u003e\n\u003cli data-section-id=\"1xxfs2m\" data-start=\"1186\" data-end=\"1225\"\u003eCrank bolt loosening due to fatigue\u003c\/li\u003e\n\u003cli data-section-id=\"170vely\" data-start=\"1226\" data-end=\"1251\"\u003eEngine timing failure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1253\" data-end=\"1404\"\u003eThe \u003cstrong data-start=\"1257\" data-end=\"1290\"\u003e3XL Racing one-piece solution\u003c\/strong\u003e replaces friction-only retention with a \u003cstrong data-start=\"1331\" data-end=\"1375\"\u003emechanically pinned crankshaft interface\u003c\/strong\u003e, preventing rotational slip.\u003c\/p\u003e\n\u003chr data-start=\"1406\" data-end=\"1409\"\u003e\n\u003ch2 data-section-id=\"f0qyku\" data-start=\"1411\" data-end=\"1432\"\u003eEngineering Design\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1evkfk8\" data-start=\"1434\" data-end=\"1460\"\u003eOne-Piece Construction\u003c\/h3\u003e\n\u003cul data-start=\"1462\" data-end=\"1608\"\u003e\n\u003cli data-section-id=\"meoud0\" data-start=\"1462\" data-end=\"1492\"\u003eReduces tolerance stack-up\u003c\/li\u003e\n\u003cli data-section-id=\"dwl8tl\" data-start=\"1493\" data-end=\"1525\"\u003eImproves structural rigidity\u003c\/li\u003e\n\u003cli data-section-id=\"vlhygf\" data-start=\"1526\" data-end=\"1574\"\u003eEnhances torque transmission under high load\u003c\/li\u003e\n\u003cli data-section-id=\"1uoq1cj\" data-start=\"1575\" data-end=\"1608\"\u003eMaximizes mechanical strength\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"qhw6v7\" data-start=\"1610\" data-end=\"1636\"\u003e4-Pin Anti-Slip Design\u003c\/h3\u003e\n\u003cul data-start=\"1638\" data-end=\"1772\"\u003e\n\u003cli data-section-id=\"1c22ghb\" data-start=\"1638\" data-end=\"1679\"\u003eBalanced rotational load distribution\u003c\/li\u003e\n\u003cli data-section-id=\"n67sw1\" data-start=\"1680\" data-end=\"1711\"\u003eRedundant locking structure\u003c\/li\u003e\n\u003cli data-section-id=\"bq1oyi\" data-start=\"1712\" data-end=\"1772\"\u003ePrecision dowel pin interface between crankshaft and hub\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"s73r5v\" data-start=\"1774\" data-end=\"1803\"\u003eMechanical Locking System\u003c\/h3\u003e\n\u003cul data-start=\"1805\" data-end=\"1955\"\u003e\n\u003cli data-section-id=\"nrkyhc\" data-start=\"1805\" data-end=\"1856\"\u003eFour hardened dowel pins lock hub to crankshaft\u003c\/li\u003e\n\u003cli data-section-id=\"7dnqll\" data-start=\"1857\" data-end=\"1903\"\u003eCapture plate prevents crank bolt rotation\u003c\/li\u003e\n\u003cli data-section-id=\"129g1bs\" data-start=\"1904\" data-end=\"1955\"\u003eToothed self-locking hardware ensures retention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1957\" data-end=\"1960\"\u003e\n\u003ch2 data-section-id=\"juhx4r\" data-start=\"1962\" data-end=\"1990\"\u003eMaterials \u0026amp; Manufacturing\u003c\/h2\u003e\n\u003cul data-start=\"1992\" data-end=\"2152\"\u003e\n\u003cli data-section-id=\"lvskow\" data-start=\"1992\" data-end=\"2036\"\u003eMaterial: 4340 High-Strength Alloy Steel\u003c\/li\u003e\n\u003cli data-section-id=\"4xyphn\" data-start=\"2037\" data-end=\"2078\"\u003eManufacturing: Precision CNC Machined\u003c\/li\u003e\n\u003cli data-section-id=\"1nwwtge\" data-start=\"2079\" data-end=\"2120\"\u003eSurface Treatment: Nitro Conditioning\u003c\/li\u003e\n\u003cli data-section-id=\"hrjzsk\" data-start=\"2121\" data-end=\"2152\"\u003eSurface Hardness: HRC 55–58\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2154\" data-end=\"2157\"\u003e\n\u003ch2 data-section-id=\"1ae01cs\" data-start=\"2159\" data-end=\"2174\"\u003eKit Includes\u003c\/h2\u003e\n\u003cul data-start=\"2176\" data-end=\"2306\"\u003e\n\u003cli data-section-id=\"1gzb7ap\" data-start=\"2176\" data-end=\"2199\"\u003eOne-piece crank hub\u003c\/li\u003e\n\u003cli data-section-id=\"s3iwc\" data-start=\"2200\" data-end=\"2223\"\u003eHardened dowel pins\u003c\/li\u003e\n\u003cli data-section-id=\"1cnviud\" data-start=\"2224\" data-end=\"2247\"\u003ePrecision drill jig\u003c\/li\u003e\n\u003cli data-section-id=\"o19u2o\" data-start=\"2248\" data-end=\"2265\"\u003eCapture plate\u003c\/li\u003e\n\u003cli data-section-id=\"homwdk\" data-start=\"2266\" data-end=\"2280\"\u003eCrank bolt\u003c\/li\u003e\n\u003cli data-section-id=\"139hnd6\" data-start=\"2281\" data-end=\"2306\"\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2308\" data-end=\"2311\"\u003e\n\u003ch2 data-section-id=\"1hhgod1\" data-start=\"2313\" data-end=\"2340\"\u003eInstallation Information\u003c\/h2\u003e\n\u003cul data-start=\"2342\" data-end=\"2508\"\u003e\n\u003cli data-section-id=\"1ng73kq\" data-start=\"2342\" data-end=\"2373\"\u003eEngine removal required: No\u003c\/li\u003e\n\u003cli data-section-id=\"19x99jk\" data-start=\"2374\" data-end=\"2416\"\u003eProfessional installation: Recommended\u003c\/li\u003e\n\u003cli data-section-id=\"ulfu9r\" data-start=\"2417\" data-end=\"2468\"\u003eSpecial tools required: Crankshaft locking tool\u003c\/li\u003e\n\u003cli data-section-id=\"j08th7\" data-start=\"2469\" data-end=\"2508\"\u003eEstimated install time: 18–24 hours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2510\" data-end=\"2535\"\u003e\u003cstrong data-start=\"2510\" data-end=\"2535\"\u003eTorque Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2537\" data-end=\"2600\"\u003e\n\u003cli data-section-id=\"kebfe6\" data-start=\"2537\" data-end=\"2565\"\u003eCrank bolt: 100Nm + 270°\u003c\/li\u003e\n\u003cli data-section-id=\"j8knvd\" data-start=\"2566\" data-end=\"2600\"\u003eCapture plate bolts: 25 ft-lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2602\" data-end=\"2605\"\u003e\n\u003ch2 data-section-id=\"nx97cd\" data-start=\"2607\" data-end=\"2622\"\u003eDesigned For\u003c\/h2\u003e\n\u003cul data-start=\"2624\" data-end=\"2741\"\u003e\n\u003cli data-section-id=\"wur5ck\" data-start=\"2624\" data-end=\"2653\"\u003eStreet performance builds\u003c\/li\u003e\n\u003cli data-section-id=\"1a46mzo\" data-start=\"2654\" data-end=\"2667\"\u003eTrack use\u003c\/li\u003e\n\u003cli data-section-id=\"nv4vxm\" data-start=\"2668\" data-end=\"2695\"\u003eHigh boost applications\u003c\/li\u003e\n\u003cli data-section-id=\"qz7wlv\" data-start=\"2696\" data-end=\"2713\"\u003eBuilt engines\u003c\/li\u003e\n\u003cli data-section-id=\"k9uj1\" data-start=\"2714\" data-end=\"2741\"\u003e+700 HP setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2743\" data-end=\"2746\"\u003e\n\u003ch2 data-section-id=\"iykr96\" data-start=\"2748\" data-end=\"2766\"\u003eCompared to OEM\u003c\/h2\u003e\n\u003cul data-start=\"2768\" data-end=\"2940\"\u003e\n\u003cli data-section-id=\"1imuyfw\" data-start=\"2768\" data-end=\"2801\"\u003eOne-piece billet construction\u003c\/li\u003e\n\u003cli data-section-id=\"13li77\" data-start=\"2802\" data-end=\"2837\"\u003eMechanical 4-pin locking system\u003c\/li\u003e\n\u003cli data-section-id=\"1acwii6\" data-start=\"2838\" data-end=\"2876\"\u003eEliminates friction-only retention\u003c\/li\u003e\n\u003cli data-section-id=\"l8w5o6\" data-start=\"2877\" data-end=\"2908\"\u003eImproved timing reliability\u003c\/li\u003e\n\u003cli data-section-id=\"1706o8z\" data-start=\"2909\" data-end=\"2940\"\u003eReduced crank hub slip risk\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2942\" data-end=\"2945\"\u003e\n\u003ch2 data-section-id=\"fgfv49\" data-start=\"2947\" data-end=\"2986\"\u003eCompared to Friction-Based Solutions\u003c\/h2\u003e\n\u003cul data-start=\"2988\" data-end=\"3091\"\u003e\n\u003cli data-section-id=\"v5ppbo\" data-start=\"2988\" data-end=\"3021\"\u003eNo relative rotation possible\u003c\/li\u003e\n\u003cli data-section-id=\"1qjnxt9\" data-start=\"3022\" data-end=\"3048\"\u003eHigher torque capacity\u003c\/li\u003e\n\u003cli data-section-id=\"1vvt6xc\" data-start=\"3049\" data-end=\"3091\"\u003eEliminates spun crank hub failure mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3093\" data-end=\"3096\"\u003e\n\u003ch2 data-section-id=\"1lml4vy\" data-start=\"3098\" data-end=\"3121\"\u003eTesting \u0026amp; Validation\u003c\/h2\u003e\n\u003cul data-start=\"3123\" data-end=\"3253\"\u003e\n\u003cli data-section-id=\"arhywn\" data-start=\"3123\" data-end=\"3157\"\u003e50,000 km test vehicle mileage\u003c\/li\u003e\n\u003cli data-section-id=\"13dtt3a\" data-start=\"3158\" data-end=\"3192\"\u003eTear-down inspection completed\u003c\/li\u003e\n\u003cli data-section-id=\"140x8zq\" data-start=\"3193\" data-end=\"3222\"\u003eNo abnormal wear observed\u003c\/li\u003e\n\u003cli data-section-id=\"iehwmu\" data-start=\"3223\" data-end=\"3253\"\u003eOngoing durability testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3255\" data-end=\"3258\"\u003e\n\u003ch2 data-section-id=\"16q3upg\" data-start=\"3260\" data-end=\"3278\"\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cul data-start=\"3280\" data-end=\"3375\"\u003e\n\u003cli data-section-id=\"16k3aya\" data-start=\"3280\" data-end=\"3300\"\u003eBMW F80 M3 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"yciq7r\" data-start=\"3301\" data-end=\"3321\"\u003eBMW F82 M4 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"rcfivq\" data-start=\"3322\" data-end=\"3342\"\u003eBMW F83 M4 (S55)\u003c\/li\u003e\n\u003cli data-section-id=\"7zrrdt\" data-start=\"3343\" data-end=\"3375\"\u003eBMW F87 M2 Competition (S55)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3377\" data-end=\"3380\"\u003e\n\u003ch2 data-section-id=\"1k5q749\" data-start=\"3382\" data-end=\"3392\"\u003eSummary\u003c\/h2\u003e\n\u003cp data-start=\"3394\" data-end=\"3602\"\u003eThe \u003cstrong data-start=\"3398\" data-end=\"3438\"\u003e3XL Racing One-Piece 4-Pin Crank Hub\u003c\/strong\u003e is designed for maximum rigidity and mechanical locking strength, making it ideal for modified S55 engines where timing stability and torque capacity are critical.\u003c\/p\u003e","brand":"3XL RACING","offers":[{"title":"Default Title","offer_id":55480527093833,"sku":null,"price":1299.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/3980\/2697\/files\/3_4b08d8f0-1b1f-4eaa-9961-26a044b9fdb7.jpg?v=1771462111","url":"https:\/\/jcseuroparts.com\/products\/3xl-racing-4-pin-one-piece-crank-hub","provider":"JCS Euro Parts","version":"1.0","type":"link"}