{"product_id":"hel-bmw-f32-f33-f36-stainless-steel-front-and-rear-brake-lines-inc-420i-430i-440i","title":"BMW 4 Series F32 F33 F36 Braided Brake Lines Hoses Kit Front \u0026 Rear (2013-2019) – Stainless Steel Performance Brake Pipes\/Flexi Hoses Upgrade, PTFE, LCI Facelift – HEL Performance 420i 430i 440i – BMW-4-639","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \n  \u003ch2\u003eBMW 4 Series F32 F33 F36 Reinforced Brake Hose Set - Front and Rear - Part Number BMW-4-639\u003c\/h2\u003e\n  \n  \u003cp\u003e\n    Give your 4 Series the stopping power and pedal response it deserves. This HEL Performance front and rear braided hose package replaces the factory rubber flexi lines with a PTFE-lined, stainless braided setup that resists expansion under pressure for a firmer, more consistent pedal. Ideal for fast road and track day use on F32 Coupe, F33 Convertible and F36 Gran Coupe models, including LCI facelift cars across 420i, 430i and 440i variants.\n  \u003c\/p\u003e\n  \n  \u003cp\u003e\n    If you are chasing sharper pedal bite, better modulation and repeatable braking lap after lap, BMW-4-639 is a proven upgrade. We run these on our own cars and customer feedback is consistently positive for control, confidence and feel. Choose your preferred hose colour, bolt on and enjoy an immediate transformation.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhy this braided hose kit is a must-have upgrade\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eNoticeably firmer pedal with reduced line swell compared to ageing OE rubber pipes\u003c\/li\u003e\n    \u003cli\u003eImproved feedback and precision when trail braking or threshold braking\u003c\/li\u003e\n    \u003cli\u003eStainless fittings and protective PVC outer for durability and corrosion resistance\u003c\/li\u003e\n    \u003cli\u003eDirect-fit flexible lines for front and rear axles - no cutting or custom fabrication\u003c\/li\u003e\n    \u003cli\u003eConfidence-inspiring performance for spirited road driving and track days\u003c\/li\u003e\n    \u003cli\u003eBacked by the manufacturer’s lifetime warranty for peace of mind\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eTechnical details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e BMW-4-639\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInner hose:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBraid and fittings:\u003c\/strong\u003e Stainless steel with protective PVC cover\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -70°C to 260°C\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInternal diameter:\u003c\/strong\u003e 3.5 mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOuter diameter:\u003c\/strong\u003e 7.5 mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMax working pressure:\u003c\/strong\u003e 290 bar\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBurst pressure:\u003c\/strong\u003e 870 bar\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMinimum bend radius:\u003c\/strong\u003e 38 mm\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eWhat you receive\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eComplete front and rear braided flexible brake line set\u003c\/li\u003e\n    \u003cli\u003eStainless banjo bolts where required\u003c\/li\u003e\n    \u003cli\u003eCopper crush washers where required\u003c\/li\u003e\n    \u003cli\u003eLifetime warranty keyring fob\u003c\/li\u003e\n    \u003cli\u003eInstallation leaflet\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eVehicle compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW 4 Series F32 Coupe 11\/2012 to 02\/2017\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series F32 LCI Coupe 05\/2016 to 12\/2019\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series F33 Convertible 03\/2013 to 02\/2017\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series F33 LCI Convertible 05\/2016 to 12\/2019\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series F36 Gran Coupe 07\/2013 to 03\/2017\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series F36 LCI Gran Coupe 05\/2016 to 12\/2019\u003c\/li\u003e\n    \u003cli\u003eEngine options: 420i, 430i, 440i\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eFitting and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Professional installation is recommended. For supply and fitting, contact MJ Modifications in Warwickshire for a quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e. We are happy to advise on brake fluid choices and setup for fast road or track day use.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eBuy with confidence\u003c\/h3\u003e\n  \u003cp\u003e\n    We have fitted and used this kit on our own BMW builds and on countless customer cars. The result is a firmer pedal, clearer feedback and more predictable braking performance. Add BMW-4-639 to your basket, pick your colour and enjoy a genuine seat-of-the-pants upgrade the first time you press the middle pedal.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003ePopular search terms\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW 4 Series brake hose kit, F32 braided brake pipes, F33 performance brake hoses, F36 braided flexi lines, 420i brake line upgrade, 430i brake hose set, 440i braided brake kit, facelift LCI brake line set, stainless braided brake pipes BMW, performance brake line package BMW 4 Series, front and rear flexi hose BMW F32 F33 F36, PTFE brake pipe set BMW, upgraded brake lines for BMW 4 Series, BMW-4-639 brake hoses, BMW 4 Series coupe cabriolet gran coupe brake line kit.\n  \u003c\/p\u003e\n  \n\u003c\/div\u003e","brand":"HEL Performance","offers":[{"title":"Transparent \/ Clear","offer_id":56008734310786,"sku":null,"price":100.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/HelBMWF87M2_M2CompetitionStainlessSteelFrontandRearBrakeLines-MLPerformanceUK_1946x_3a3aa31f-ba7d-4b32-b886-e089872d27ac.jpg?v=1764091537","url":"https:\/\/mjmodifications.co.uk\/products\/hel-bmw-f32-f33-f36-stainless-steel-front-and-rear-brake-lines-inc-420i-430i-440i","provider":"MJ Modifications","version":"1.0","type":"link"}