{"product_id":"rk-autowerks-4-pin-crank-hub-bmw-n55-s55-f8x","title":"RK Autowerks 4 Pin Crank Hub, BMW N55 \/ S55 (F8X)","description":"\u003cp\u003eEliminate Crank Hub Failure on Your N55\/S55 with RK Autowerks’ 4-Pin Solution\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCrank hub issues have plagued BMW N55 and S55 engines for over a decade—causing crankshaft spin, timing drift, and costly internal damage. RK Autowerks answers this problem with a precisely engineered fix: the RK 4-Pin Crank Hub.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCNC machined in-house at RK’s Texas facility and made from heat-treated 4130 Chromoly steel, this crank hub offers unmatched durability and precision. The 4-pin design prevents the valve timing and oil pump chains from spinning independently, locking the crank hub to the crank nose for rock-solid alignment and long-term reliability—even on high-horsepower builds.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDeveloped by Raza and the RK team, this hub has been laser scanned for perfect fitment and is a direct replacement for the OEM part. Whether you're running a stock engine or a heavily modified setup, this upgrade is a must-have for peace of mind and performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCNC machined from heat-treated 4130 Chromoly\u003c\/p\u003e\n\u003cp\u003e4-pin design locks the crank hub to the crankshaft\u003c\/p\u003e\n\u003cp\u003eEliminates timing inconsistencies and crank spin\u003c\/p\u003e\n\u003cp\u003ePerfect fitment verified via laser scanning\u003c\/p\u003e\n\u003cp\u003eDesigned and manufactured in the USA\u003c\/p\u003e\n\u003cp\u003eDirect OEM replacement for N55 and S55 engines\u003c\/p\u003e\n\u003cp\u003eThe comprehensive kit includes the following components:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOne-piece crank hub\/timing gear\u003c\/p\u003e\n\u003cp\u003eKeyed oil pump gear\u003c\/p\u003e\n\u003cp\u003eDrill bit\u003c\/p\u003e\n\u003cp\u003eDrill guide\u003c\/p\u003e\n\u003cp\u003eBMW N55 Applications:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e1 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2010-2013 E82\/E88 135i\u003c\/p\u003e\n\u003cp\u003e2012-2016 F20\/F21 M135i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2014-2016 F22\/F23 M235i\u003c\/p\u003e\n\u003cp\u003e2016-2018 F87 M2\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e3 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2010-2015 E90\/E91\/E92\/E93 335i\u003c\/p\u003e\n\u003cp\u003e2012-2015 F30\/F31\/F34 335i\u003c\/p\u003e\n\u003cp\u003e2015-2016 F30\/F31 340i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e4 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2013-2016 F32\/F33\/F36 435i\u003c\/p\u003e\n\u003cp\u003e2016 F32\/F33\/F36 440i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e5 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2010-2016 F10\/F11 535i\u003c\/p\u003e\n\u003cp\u003e2010-2017 F07 535i GT\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e6 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2011-2018 F12\/F13\/F06 640i Gran Coupe\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e7 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2012-2015 F01\/F02 740i \/ 740Li\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eX1 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2013-2015 E84 X1 xDrive35i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eX3 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2011-2017 F25 X3 xDrive35i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eX4 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2014-2017 F26 X4 xDrive35i\u003c\/p\u003e\n\u003cp\u003e2016-2017 F26 X4 M40i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eX5 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2011-2018 E70\/F15 X5 xDrive35i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eX6 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2011-2019 E71\/F16 X6 xDrive35i\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eALPINA N55 Applications:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eB3 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2013-2018 F30\/F31 B3 Bi-Turbo\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eB4 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2014-2019 F32\/F33 B4 Bi-Turbo\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eB5 Series\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2010-2016 F10 B5 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