{"product_id":"stone-exhaust-bmw-n55-f06-f12-f13-640i-cat-back-valvetronic-exhaust","title":"Stone Exhaust BMW N55 F06 F12 F13 640i Cat-Back Valvetronic Exhaust","description":"\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eWe are proud to introduce you to the state of the art Stone Exhaust Valvetronic Cat-Back Exhaust System with dual valves, to enhance the performance and sound of your BMW F06 640i Gran Coupe (2011) \u0026amp; \u003cspan\u003eF\u003c\/span\u003e\u003cspan\u003e12\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e640i Convertible (2009) \u0026amp; F\u003cspan\u003e13\u003c\/span\u003e 640i Coupe (2010)\u003c\/span\u003e with the N55 engine, manufactured after 2009, 2010 and 2011. Stone Exhaust has been developing world's best exhaust system since 1998, starting with 3D scanning and reverse engineering the OEM system, this allows the Stone engineers to design a 100% OEM fitment exhaust with precision. With their in-house dyno, your BMW exhaust system is proven to produce more power with the enhanced Stone signature exhaust sound.\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan\u003eThe Cat-Back Valvetronic System comes with a separate remote controller that gives you full control of the exhaust, allowing you to open and close the valves with a click of a button. You can also set it in auto mode for the valves to open at a certain rpm automatically. The Stone Valvetronic system is a plug and play system, and connects to your OBDII port, which can be installed within a few minutes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003eStone Valvetronic System Installation \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" height=\"672\" width=\"1195\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTONE Valvetronic BMW N55 F06 F12 F13 640i  Exhaust System.\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eValvetronic System\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003ePlug and Play OBDII controller\u003c\/li\u003e\n\u003cli\u003eOne Piece Design\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMechanical Welding with Precision\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eIn House Research and Development\u003c\/li\u003e\n\u003cli\u003e3D Scanning \u0026amp; Reverse Engineering\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDyno Developed In House\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEliminates drone found on the standard exhaust system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/article\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003eBMW N55 F13 640i with Stone Exhaust Catless DP + Valvetronic Cat-back Exhaust System Sound\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/lWFVC8cmG0Q\" height=\"672\" width=\"1195\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOPF Delete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003eStone offers an OPF delete, which can be included free of charge, this allows you to install the Stone Cat-Back exhaust system on OPF equipped cars without throwing an error code, thus coding out the OPF error code on the ECU is not required.\u003c\/div\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan\u003e\u003cstrong\u003eR\u0026amp;D and 3D Scanning\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan\u003eStone Exhaust engineers use reverse engineering by 3D scanning OEM parts to understand their functionality and identify weaknesses. Data has been collected continuously in order to analyze factors such as pipe diameter, route and degrees of the bending angles of the Catless Downpipe found on the BMW F06 F12 F13 640i. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan\u003eDuring R\u0026amp;D, Stone Exhaust utilizes the 3D simulation software to stimulate the exhaust gas flow movement, thermal and pressure rise zone. Progressive improvements were continually made until the optimal performance was achieved.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\" alt=\"Stone Exhaust System 3D Scanning Reverse Engineering UK - \" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValvetronic System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Stone Valvetronic System was independently researched and developed in house. The system forgoes the conventional design of complicated wiring and the rubber inside the valve which is prone to ageing, to ensure longevity.\u003c\/p\u003e\n\u003cp\u003eWith the Valvetronic remote control providing three modes to choose from: ON \/ OFF \/ AUTO, this allows for instant switching between modes in accordance to driving conditions faced. So, let the STONE Valvetronic System adapt to your vehicle’s needs.\u003c\/p\u003e\n\u003cp\u003eThe Valvetronic remote control has 3 modes, ON \/ OFF \/ AUTO, which allows you to open and close the valve at a click of a button. The Auto mode allows customization of the opening and closing of the valve at a predefined RPM.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled_e55d1881-dc86-4cb6-a91c-734c502c538f_600x600.png?v=1587977200\" alt=\"Stone Exhaust BMW N55 F87 M2 Cat-Back Valvetronic Exhaust - \" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7 Axis CNC Bending Machine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStone Exhaust System are constructed utilizing a 7 axis CNC Bending Machine which is the ultimate machine for high levels of precision delivery, necessary for industries such as the aerospace and defense industries.\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\u003c\/ol\u003e\n\u003cp\u003eWith the state-of-the-art bending machine, Stone Exhaust has achieved the industry’s standard to an impressive 98% roundness, whilst maintaining the wear of the outer bore at only 25% at 180\u003cstrong\u003e°\u003c\/strong\u003e. Airflow obstruction and welding fracture problems are prevented by utilizing this technology. With the combination of the CNC Bending machine, Reverse Engineering and 3D Design Scanning, Stone exhaust has created an integrally molded exhaust pipe with an accuracy error under 0.025mm.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\" alt=\"Stone Exhaust System UK Bending - \" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCrisscross and Overlapping Welding Technique\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe flange between the turbo and the downpipes reaches extreme temperatures (800℃ to 1100℃) which creates stress on the connection point. By utilizing both welding techniques to increases the width and penetration of welds. This increases the endurance and tolerance of these connection points, leading to quality products with reliable performance.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_1024x1024.jpg?v=1572828150\" alt=\"Stone Exhaust Art of Welding - \" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDirect Spot Welding\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOur highly skilled engineers perform direct spot welding to increase product strength. This is undertaken by mechanical welding arms, proven to achieve greater precision and penetration in their welds compared to manual welding, resulting in an end product that is a work of art.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_1024x1024.jpg?v=1572828178\" alt=\"Stone Exhaust Art of Welding - \" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility - N55 Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBMW 6 Series\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF06 640i (2011+)\u003c\/li\u003e\n\u003cli\u003eF06 640i xDrive (2011+)\u003c\/li\u003e\n\u003cli\u003eF06 LCI 640i (2014+)\u003c\/li\u003e\n\u003cli\u003eF06 LCI 640i \u003cspan\u003exDrive\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e(2014+)\u003c\/li\u003e\n\u003cli\u003eF12 640i (2009+)\u003c\/li\u003e\n\u003cli\u003eF12 640i xDrive (2012+)\u003c\/li\u003e\n\u003cli\u003eF12 LCI 640i \/ 640i xDrive (2014+)\u003c\/li\u003e\n\u003cli\u003eF13 640i (2010+)\u003c\/li\u003e\n\u003cli\u003eF13 640i xDrive (2012+)\u003c\/li\u003e\n\u003cli\u003eF13 LCI 640i \/ 640i xDrive (2014+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/article\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eStone Exhaust 2 Year Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufactured by\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStone Exhaust\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePart Number\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAP511AS (F06)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAP511BS (F12\/F13)\u003c\/span\u003e\u003c\/p\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e\n\u003carticle data-scroll-scope=\"\" class=\"unreset\"\u003e\u003c\/article\u003e","brand":"Stone Exhaust","offers":[{"title":"F06 \/ Flat Cut Gloss Carbon Fiber (102mm)","offer_id":64545045283165,"sku":"AP511AS-1020CG","price":4754.78,"currency_code":"GBP","in_stock":true},{"title":"F12\/F13 \/ Flat Cut Gloss Carbon Fiber (102mm)","offer_id":64545045315933,"sku":"AP511BS-1020CG","price":4802.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1069\/0009\/5325\/files\/1N__K_7no-ROX8MV2HTlyopAw63r2X31p_5a2a2b69-d639-4dcb-a070-bb58788931f4.jpg?v=1777364758","url":"https:\/\/performancepartsdirect.co.uk\/products\/stone-exhaust-bmw-n55-f06-f12-f13-640i-cat-back-valvetronic-exhaust","provider":"Performance Parts Direct","version":"1.0","type":"link"}