{"product_id":"mmx-performance-crank-hub-4-pinned-single-piece-upgrade-i-bmw-s55-i-n55","title":"MMX Performance - CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55","description":"\u003cp style=\"text-align: left;\"\u003eEngine failures caused by the standard three-piece crank hub on the S55 \u0026amp; N55 engine are (unfortunately) well known, but these are fully addressed with the installation of the MMR Performance 4-Pinned Single-Piece billet Crank Hub, together with the option of adding our Capture Plate for ultimate security. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/CRANKHUBPINNED4crop_480x480.jpg?v=1690803309\" alt=\"MMR Pinned Crank Hub\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eMMR Performance now offers this uprated version of our popular Single-Piece Crank Hub, with a 4-Pin dowelled location that locks onto the end of the crankshaft. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThe OE crank hub unit's friction plate are known to slip rotationally, causing the timing to alter enough that piston-to-valve contact can occur, leaving owners with a very expensive repair bill.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThis 4-pin version of our\u003cspan\u003e \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eSingle\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e-Piece\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003eCrank Hub kit is simply the ultimate solution to preventing this problem before it happens on high horsepower \u0026amp; torque engines.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThe centrepiece of the MMR kit is the UK made CNC-machined one-piece crank hub, created from billet EN36 steel that's been heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Along with this comes four aerospace precision machined dowels that mechanically lock the hub to end of the crank itself, plus a brand new OE bolt. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eInstallation of these dowels is certainly not a DIY job. But to make the job easier for the professionals, ensuring that the required crank modifications are made safely and accurately, the MMR kit also includes a full installation jig that includes a bolt-on drilling guide, a location bolt for this guide, plus an HSS r\u003cspan data-mce-fragment=\"1\"\u003eolled high speed Drill Bit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"MMR Pinned Crank Hub BMW S55\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/CRANKHUBPINNED5crop_480x480.jpg?v=1690803352\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/CRANKHUBPINNED5crop_480x480.jpg?v=1690803352\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eTogether, the Single-Piece design combined with the 4-Pin location ensures that there is now no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability versus the OE version.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eAs MMR Performance offers two versions of the Single-Piece Crank Hub, which is best for you, pinned or unpinned?  For most standard to Stage 1 tuned S55 \u0026amp; N55 engines, the\u003c\/span\u003e\u003cspan\u003e \u003cem\u003eunpinned\u003c\/em\u003e MMR Single-Piece Crank Hub (MMR20-1003) is more than sufficient. Installation is more straightforward as the end of the crankshaft does not need to be precision drilled to mount the four locating dowels. However, for high power\/torque engines tuned beyond this level, \u003c\/span\u003e\u003cspan\u003ewe \u003c\/span\u003e\u003cspan\u003erecommend this upgraded \u003cem\u003epinned\u003c\/em\u003e version of the Crank Hub that \u003c\/span\u003e\u003cspan\u003eincorporates\u003c\/span\u003e\u003cspan\u003e the 4-pin dowel drive mounting for the ultimate engine security.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"color: #808080;\"\u003e\u003cem\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/oem-vs-mmr_51388961325_o-Quick_Preset_2729x1737_d6631e68-21ab-4969-bf9f-ff2c021ef2d4_480x480.png?v=1664208383\" alt=\"\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/oem-vs-mmr_51388961325_o-Quick_Preset_2729x1737_d6631e68-21ab-4969-bf9f-ff2c021ef2d4_480x480.png?v=1664208383\"\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cem data-mce-fragment=\"1\"\u003eOE Multi-Piece Crank Hub (L) compared to MMR Single Piece Crank Hub (R)\u003c\/em\u003e\u003cem data-mce-fragment=\"1\"\u003e \u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eFinally. as another option alongside the 4-Pinned Crank Hub, adding the MMR Capture Plate ensures that owners have complete peace of mind. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThe Capture Plate removes the possibility for the crank bolt to be able to loosen with the engine's vibrations or harmonics. The Capture Plate is an additional billet aluminium hat that securely bolts over the entire head of the crank bolt, making it literally impossible for the bolt to come undone. Please select from the product option below at point of ordering to include a Capture Plate with your order.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/Crank_Hub-2-Quick_Preset_526x373_f2ff7fff-fa52-4e11-a989-c03680621432_480x480.png?v=1664208355\" alt=\"\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/Crank_Hub-2-Quick_Preset_526x373_f2ff7fff-fa52-4e11-a989-c03680621432_480x480.png?v=1664208355\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"color: #808080;\"\u003e\u003cem\u003eSingle-Piece Crank Hub (L) with Capture Plate (R)\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eS55 and N55 bolt torque – 100Nm initial torque plus 270 degrees.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"color: #808080;\"\u003eFor BMW M2C, M3 and M4 S55-engined cars running high power and torque tuning setups, and N55-powered M2, M135i, M235i, 335i \u0026amp; 435i cars, MMR have engineered the most comprehensive solution on the market and at one of the most compelling price points. Don't run high power without one!\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eRead our Blog about the Crank Hub problems\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.mmrperformance.co.uk\/post\/what-you-need-to-know-about-the-bmw-s55-n55-crank-hub-failure\" title=\"What you need to know about the S55 \u0026amp; N55 Crank Hub Failure\" data-mce-href=\"https:\/\/www.mmrperformance.co.uk\/post\/what-you-need-to-know-about-the-bmw-s55-n55-crank-hub-failure\" target=\"_blank\"\u003ehere\u003c\/a\u003e:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/www.mmrperformance.co.uk\/post\/what-you-need-to-know-about-the-bmw-s55-n55-crank-hub-failure\" title=\"What you need to know about BMW S55 \u0026amp; N55 Crank Hub Slip Failure\" data-mce-href=\"https:\/\/www.mmrperformance.co.uk\/post\/what-you-need-to-know-about-the-bmw-s55-n55-crank-hub-failure\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/CRANK_HUB_480x480.jpg?v=1664264345\" alt=\"\" width=\"351\" height=\"208\" style=\"display: block; margin-left: auto; margin-right: auto;\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/3206\/8967\/files\/CRANK_HUB_480x480.jpg?v=1664264345\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e FITMENT DETAILS\u003c\/h3\u003e\n\u003cdiv style=\"text-align: left;\"\u003eThis will fit all models with N55 and S55 engines. Most popular models:\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M2 F87 2015-2018\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M2 Competition F87 2018-2021\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M3 F80 - 2014-2019\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M4 F82 - 2014-2020\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M135i F2x 2011 - 2019\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW M235i F2x 2013 - 2020\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW 335i F3x 2011-2019\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eBMW 435i F3x 2013-2020\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"MMX Performance (Formally MMR)","offers":[{"title":"With Capture Plate","offer_id":51064406475101,"sku":"MMR20-1004FK","price":944.49,"currency_code":"GBP","in_stock":true},{"title":"without Capture Plate","offer_id":51064406507869,"sku":"MMR20-1004","price":818.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/0411\/2989\/files\/CRANKHUBPINNEDH2alr_744x.progressive_ea10abda-e63d-40c5-8228-a3dee3c276ed.jpg?v=1714814637","url":"https:\/\/nineteen72performance.co.uk\/products\/mmx-performance-crank-hub-4-pinned-single-piece-upgrade-i-bmw-s55-i-n55","provider":"Nineteen72 Performance","version":"1.0","type":"link"}