{"product_id":"stone-exhaust-bmw-n55-f30-f32-cat-back-valvetronic-exhaust-inc-335i-435i","title":"Stone Exhaust BMW N55 F30 \u0026 F32 OEM Integrated Valved Catback Exhaust System (Inc. 335i \u0026 435i)","description":"\u003carticle class=\"unreset\" data-scroll-scope=\"\"\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, to enhance the performance and sound of your BMW F30 Sedan 335i (2011), F31 Touring 335i (2011), F32 Coupe 435i (2013), F33 Convertible 435i (2013) and F36 Gran Coupe 435i (2013) with the N55 engine, manufactured after 2011 and 2013. 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 OEM Integred Valveoption allows your exhuast system to operate as standard, where the onboard computer (ECU) will control the opening and closing of the valves automatically.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eYou may wish to add the \u003c\/span\u003e\u003cspan style=\"color: #2b00ff;\"\u003e\u003ca style=\"color: #2b00ff;\" href=\"\/products\/stone-cat-back-valvetronic-system-package\" target=\"_blank\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eStone Valvetronic System\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e (Single Valve) which enables you to control the valves remotely via the stone remote controller.\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 width=\"1195\" height=\"672\" src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\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 F30 F31 F32 F33 F36 335i \u0026amp; 435i Exhaust System.\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOEM Integration \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eAvailable to add-on Stone Valvetronic System\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\u003cp class=\"unreset\"\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBMW F30 N55 335i install STONE EXHAUST\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"1195\" height=\"672\" src=\"https:\/\/www.youtube.com\/embed\/mP37wyVVxNM\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitted Photo(s)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust BMW N55 F30 \u0026amp; F32 Cat-Back Valvetronic Exhaust (Inc. 335i \u0026amp; 435i) - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F30_F32_Cat-Back_Valvetronic_Exhaust_Inc._335i_435i_Stone_Exhaust_USA_-1_600x600.png?v=1591328615\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust BMW N55 F30 \u0026amp; F32 Cat-Back Valvetronic Exhaust (Inc. 335i \u0026amp; 435i) - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F30_F32_Cat-Back_Valvetronic_Exhaust_Inc._335i_435i_Stone_Exhaust_USA_-2_600x600.png?v=1591328630\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust BMW N55 F30 \u0026amp; F32 Cat-Back Valvetronic Exhaust (Inc. 335i \u0026amp; 435i) - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F30_F32_Cat-Back_Valvetronic_Exhaust_Inc._335i_435i_Stone_Exhaust_USA_-3_600x600.png?v=1591328638\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust BMW N55 F30 \u0026amp; F32 Cat-Back Valvetronic Exhaust (Inc. 335i \u0026amp; 435i) - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F30_F32_Cat-Back_Valvetronic_Exhaust_Inc._335i_435i_Stone_Exhaust_USA_-4_600x600.png?v=1591328649\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust BMW N55 F30 \u0026amp; F32 Cat-Back Valvetronic Exhaust (Inc. 335i \u0026amp; 435i) - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F30_F32_Cat-Back_Valvetronic_Exhaust_Inc._335i_435i_Stone_Exhaust_USA_-5_600x600.png?v=1591328658\"\u003e\u003c\/div\u003e\n\u003cp\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 Exhaust System found on the BMW N55 F30, F32, 335i \u0026amp; 435i. \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 style=\"float: none;\" alt=\"Stone Exhaust System 3D Scanning Reverse Engineering - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\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\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust System Bending - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\"\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 - ML Performance US\" style=\"float: none;\" width=\"1024x1024\" height=\"1024x1024\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cstrong\u003eDirect Spot Welding \u003c\/strong\u003e\u003c\/div\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 style=\"float: none;\" alt=\"Stone Exhaust Art of Welding - ML Performance US\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_1024x1024.jpg?v=1572828178\"\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 3 Series\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF30\/F31 335i\/335i xDrive (2011+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBMW 4 Series \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF32 435i\/435i x\u003cspan\u003eDrive (2012+)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eF33 435i\/435i x\u003cspan\u003eDrive (2013+)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eF36 435i\/435i x\u003cspan\u003eDrive (2013+)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eStone Exhaust 2 Year Warranty\u003c\/p\u003e\n\u003cp class=\"unreset\"\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\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eAP514 \u003cspan\u003e(Dual Exit with Single Tailpipe \/ Require Original Bumper)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eAP514Q \u003cspan\u003e(Dual Exit with Quad Tailpipes \/ Require M Sport Bumper)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e\n\u003carticle class=\"unreset\" data-scroll-scope=\"\"\u003e\u003c\/article\u003e","brand":"Stone Exhaust","offers":[{"title":"Dual Exit with Twin Tailpipes \/ Require Original Bumper \/ Flat Cut Gloss Carbon Fiber (82mm)","offer_id":48679164412129,"sku":"AP514-8200CG","price":2857.0,"currency_code":"GBP","in_stock":true},{"title":"Dual Exit with Quad Tailpipes \/ Require M Sport Bumper \/ Flat Cut Gloss Carbon Fiber (82mm)","offer_id":48679164444897,"sku":"AP514Q-8200CG","price":3322.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/7608\/4961\/files\/STONEEXHAUSTBMWN55F30_F32CAT-BACKVALVETRONICEXHAUST_INC.335I_435I__01_cfca14a1-d10b-4b04-a2fb-4571ccac8b24.jpg?v=1784821283","url":"https:\/\/mlperformanceusa.com\/products\/stone-exhaust-bmw-n55-f30-f32-cat-back-valvetronic-exhaust-inc-335i-435i","provider":"ML Performance USA","version":"1.0","type":"link"}