{"product_id":"mmx-performance-bmw-s55-n55-one-piece-high-hp-crank-hub-upgrade-kit-4-pin","title":"MMX Performance BMW S55 \/ N55 One-Piece High HP Crank Hub Upgrade Kit - 4-Pin","description":"\u003cp\u003eThe MMX Performance BMW S55 \/ N55 One-Piece High HP Crank Hub Upgrade Kit (4-Pin) is the ultimate solution for addressing one of the most well-documented failure points in modern BMW turbocharged engines. The factory three-piece crank hub design is known to slip under high load conditions, particularly in tuned or high-horsepower applications, which can result in catastrophic engine damage. MMX has engineered a complete solution that eliminates this risk entirely.\u003c\/p\u003e\n\n\u003cp\u003eAt the core of the kit is a precision CNC-machined, one-piece crank hub manufactured in the UK from billet EN36 steel. This material is heat-treated with a 0.75mm case hardening process, delivering exceptional strength, wear resistance, and long-term durability. Unlike the factory friction-based system, the MMX hub uses a mechanical locking approach with four aerospace-grade dowels that secure the hub directly to the crankshaft, preventing any possibility of slip.\u003c\/p\u003e\n\n\u003cp\u003eThis four-pin design, combined with the single-piece construction, ensures that timing integrity is permanently maintained even under extreme load, high boost, and aggressive driving conditions. When paired with the correct torque procedure using the supplied new OE crank bolt, the result is a significant increase in engine reliability and peace of mind.\u003c\/p\u003e\n\n\u003cp\u003eTo support accurate installation, the MMX kit includes a complete drilling jig system designed specifically for professional installation. This ensures precise alignment when modifying the crankshaft, allowing for safe and repeatable installation. The kit includes a bolt-on drilling guide, location hardware, and a high-speed steel drill bit, providing everything required for proper fitment.\u003c\/p\u003e\n\n\u003cp\u003eThis upgrade is strongly recommended for high-performance vehicles, particularly those exceeding 700 horsepower, where the risk of crank hub slip is significantly increased.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-piece crank hub design eliminates OEM slip risk\u003c\/li\u003e\n  \u003cli\u003eFour aerospace precision-machined dowels for mechanical locking\u003c\/li\u003e\n  \u003cli\u003eManufactured from heat-treated billet EN36 steel\u003c\/li\u003e\n  \u003cli\u003e0.75mm case hardened for maximum durability\u003c\/li\u003e\n  \u003cli\u003eIncludes new OE crank bolt\u003c\/li\u003e\n  \u003cli\u003eComplete installation kit with drilling jig and HSS drill bit\u003c\/li\u003e\n  \u003cli\u003eAvailable with optional capture plate for additional security\u003c\/li\u003e\n  \u003cli\u003eDesigned for high-performance and high-horsepower applications\u003c\/li\u003e\n  \u003cli\u003eSKU: MMR20-1004\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m3-f80\" target=\"_blank\"\u003eBMW F80 M3\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/4-series-f32-f33\" target=\"_blank\"\u003eBMW F82 \/ F83 M4\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m2-f87\" target=\"_blank\"\u003eBMW F87 M2\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m2-competition-f87\" target=\"_blank\"\u003eBMW F87 M2 Competition \/ CS\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/2-series-f22-f23\" target=\"_blank\"\u003eBMW F22 \/ F23 2 Series\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/3-series-f30-f31\" target=\"_blank\"\u003eBMW F30 \/ F31 3 Series\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/4-series-f32-f33\" target=\"_blank\"\u003eBMW F32 \/ F33 4 Series\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes a 1-year manufacturer warranty against defects in materials and workmanship\u003c\/li\u003e\n  \u003cli\u003eDesigned and tested in the United Kingdom\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRelated Products\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/products\/mmr-performance-bmw-s55-n55-one-piece-crank-hub-upgrade-kit?variant=44354756542660\" target=\"_blank\"\u003eMMX S55 \/ N55 One-Piece Crank Hub Upgrade Kit (Standard Version)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProfessional installation required due to crankshaft modification\u003c\/li\u003e\n  \u003cli\u003eBMW S55 and N55 crank bolt torque: 100 Nm initial torque plus 270 degrees\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IND Distribution","offers":[{"title":"Without Capture Plate","offer_id":47411568509122,"sku":"MMR20-1004","price":1064.18,"currency_code":"USD","in_stock":true},{"title":"With Capture Plate (MMR20-1002)","offer_id":47411568541890,"sku":"MMR20-1004FK","price":1227.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/0784\/7874\/files\/MMR-PCHK-5.jpg?v=1776275672","url":"https:\/\/grocerygetterperformance.com\/products\/mmx-performance-bmw-s55-n55-one-piece-high-hp-crank-hub-upgrade-kit-4-pin","provider":"Grocery Getter Performance","version":"1.0","type":"link"}