{"title":"Blog 17\/01\/2025 - Cat-back Exhaust","description":"","products":[{"product_id":"stone-exhaust-bmw-s55-f80-f82-cat-back-exhaust-system-m3-m4","title":"Stone Exhaust BMW S55 F80 F82 OEM Integrated Valve Catback Exhaust System (M3 \u0026 M4)","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThis Exhaust System is often purchased with the\u003cb\u003e \u003ca href=\"https:\/\/www.mlperformance.co.uk\/products\/stone-exhaust-bmw-s55-f80-f82-f87-catless-downpipe-m2-competition-m3-m4?_pos=2\u0026amp;_sid=819e6e84e\u0026amp;_ss=r\" title=\"Stone Exhaust BMW S55 F80 F82 F87 Catless Downpipe (M2 Competition, M3 \u0026amp; M4)\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline; color: #2b00ff;\"\u003eStone Exhaust BMW S55 F80 F82 F87 Catless Downpipe (M2 Competition, M3 \u0026amp; M4)\u003c\/span\u003e\u003c\/a\u003e \u003c\/b\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 href=\"https:\/\/www.mlperformance.co.uk\/products\/stone-cat-back-valvetronic-system-package?variant=42380125077725\" style=\"color: #2b00ff;\" 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 which enables you to control the valves remotely via the stone remote controller\u003c\/span\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 valve(s), to enhance the performance and sound of your BMW F80 Sedan M3 \u0026amp; F82 Coupe M4 with the S55 engine.\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eStone 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 our 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 Valves(s) option 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\u003e\u003cstrong\u003e\u003cspan face=\"Liberation Serif, serif\"\u003e\u003cspan size=\"3\"\u003ePlease Note: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan face=\"Liberation Serif, serif\"\u003e\u003cspan size=\"3\"\u003eYou will require the following additional parts to fit this exhaust:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan face=\"Liberation Serif, serif\"\u003e\u003cspan size=\"3\"\u003e2x \u003cspan\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.mlperformance.co.uk\/products\/genuine-bmw-s55-downpipe-gasket-m2-competition-m3-m4\" title=\"Genuine BMW S55 Downpipe Gasket - Exhaust Side (M2 Competition, M3 \u0026amp; M4)\" target=\"_blank\"\u003eGenuine BMW S55 Downpipe Gasket - Exhaust Side (M2 Competition, M3 \u0026amp; M4)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan face=\"Liberation Serif, serif\"\u003e\u003cspan size=\"3\"\u003e4x \u003cspan\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.mlperformance.co.uk\/products\/genuine-bmw-f10-f80-f87-g15-catalytic-exhaust-centre-collar-nut-inc-m550ix-760i-m850ix-m6\" title=\"Genuine BMW F10 F80 F87 G15 Catalytic Exhaust Centre Collar Nut - M8 (Inc. M550iX, 760i, M850iX \u0026amp; M6)\" target=\"_blank\"\u003eGenuine BMW F10 F80 F87 G15 Catalytic Exhaust Centre Collar Nut - M8 (Inc. M550iX, 760i, M850iX \u0026amp; M6)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"unreset\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSTONE Valvetronic M3 \u0026amp; M4 Exhaust System.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eOEM Integration \u003c\/li\u003e\n\u003cli\u003eOptional Stone Valvetronic System available\u003c\/li\u003e\n\u003cli\u003ePlug and Play OBDII controller\u003c\/li\u003e\n\u003cli\u003eOne Piece Design\u003c\/li\u003e\n\u003cli\u003eMachine Welding\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\u003e\u003cspan\u003eEliminates drone found on the standard exhaust system\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStone Exhaust M3 \u0026amp; M4 Catless Downpipe with Stone Valvetronic Exhaust System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/3TDiAsHfG0U\" 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\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003ePower Gain\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"scrollable-wrapper\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr class=\"content-list\"\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"title\"\u003ePOWER\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"symbol\"\u003e+\u003c\/span\u003e12.2PS \u003cbr\u003eat\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"num2\"\u003e6800\u003c\/span\u003erpm\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"title\"\u003eTORQUE\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"symbol\"\u003e+9.8nm \/ 7.2ft-lb of torque\u003c\/span\u003e\u003cbr\u003eat\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"num2\"\u003e2500\u003c\/span\u003erpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\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 Exhaust System found on the BMW S55 F80 M3 and F82 M4.\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 UK - ML Performance UK\" 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\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\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust System UK Bending - ML Performance UK\" 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: start;\"\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 UK\" width=\"1024x1024\" height=\"1024x1024\" 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: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"Stone Exhaust Art of Welding - ML Performance UK\" 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\u003ch4\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eS55 Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBMW M Series\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF80 M3 \u003cspan data-mce-fragment=\"1\"\u003eSaloon\u003c\/span\u003e (2012-2015)\u003c\/li\u003e\n\u003cli\u003eF80 LCI M3 \u003cspan data-mce-fragment=\"1\"\u003eSaloon\u003c\/span\u003e (2015-2018)\u003c\/li\u003e\n\u003cli\u003eF82 M4 Coupe (2013-2017)\u003c\/li\u003e\n\u003cli\u003eF82 LCI M4 \u003cspan data-mce-fragment=\"1\"\u003eCoupe \u003c\/span\u003e(2016-2018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eAP507 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eMore Information \u003c\/h4\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\u003eWarranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStone Exhaust 2 Year Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (82mm)","offer_id":58410485350787,"sku":"AP507-8200CG","price":3275.64,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1018\/6506\/2787\/files\/STONEEXHAUSTBMWS55F80F82CAT-BACKEXHAUSTSYSTEM_M3_M4__01.jpg?v=1783521056"},{"product_id":"stone-exhaust-porsche-718-cayman-boxster-s-gts-cat-back-valvetronic-exhaust-system-2-0t-2-5t","title":"Stone Exhaust Porsche 982 718 Cayman S\/GTS \u0026 Boxster S\/GTS Cat-Back Valvetronic Exhaust System (2.0T \u0026 2.5T)","description":"\u003cp class=\"unreset\"\u003e\u003cstrong\u003eDescriptoin\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 Porsche 718 Cayman S\/GTS or Boxster S\/GTS. Stone Exhaust has been developing world's best exhaust system since 1998, starting with 3D scanning and reverse engineering of the OEM system, this enables Stone to design 100% OEM fitment exhaust with precision. With their in-house dyno, your Porsche exhaust system is proven to produce more power \u003cspan\u003ewith the enhanced Stone signature exhaust sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003eThe Cat-Back Valvetronic System comes with a separate remote controller that allows 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 valvetronic system is plug and play and connects to your OBDII port.\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\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/strong\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 PORSCHE 718 Cayman \/ Boxster Exhaust 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\u003eRemote Control with On \/ Off \/ Auto settings \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 \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003ePorsche 718 Cayman S with Catless Downpipe \u0026amp; Cat-Back Valvetronic System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/uEVhOMBktog\" height=\"315\" width=\"560\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003ePorsche 718 Cayman S 982 with \u003cspan style=\"text-decoration: underline; color: #2b00ff;\"\u003e\u003ca style=\"color: #2b00ff; text-decoration: underline;\" title=\"STONE EXHAUST PORSCHE 718 CAYMAN BOXSTER S\/GTS EDDY CATALYTIC DOWNPIPE (2.0T \u0026amp; 2.5T) - ML Performance UK\" href=\"https:\/\/www.mlperformance.co.uk\/products\/stone-exhaust-porsche-718-cayman-boxster-s-gts-eddy-catalytic-downpipe-2-0t-2-5t?_pos=1\u0026amp;_sid=dbc204ce7\u0026amp;_ss=r\" target=\"_blank\"\u003eEddy Catalytic Downpipe\u003c\/a\u003e\u003c\/span\u003e and Cat-Back Valvetronic Exhaust System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/CLHAVG3bgfo\" height=\"315\" width=\"560\" 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\u003eValvetronic System Installation Video\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" height=\"315\" width=\"560\" 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 Exhaust System found on the PORSCHE 718 Cayman \/ Boxster.\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 - ML Performance 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 aging, 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\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg alt=\"Valvetronic System | Stone Exhaust USA\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/valvetronic_4bbd64f4-a300-4728-beae-be9da6be047f_480x480.png?v=1619576730\" data-mce-selected=\"1\"\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\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 - ML Performance UK\" 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: start;\"\u003e\u003cimg style=\"float: none;\" height=\"1024x1024\" width=\"1024x1024\" alt=\"Stone Exhaust Art of Welding - ML Performance UK\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_1024x1024.jpg?v=1572828150\"\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: start;\"\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 - ML Performance UK\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003cb data-mce-fragment=\"1\"\u003e \u003c\/b\u003e- 2.0T\/2.5T Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePorsche\u003cspan\u003e \u003c\/span\u003e718 Cayman (982) (2016+)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePorsche\u003cspan\u003e \u003c\/span\u003e718 Cayman S (982) (2016+)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePorsche\u003cspan\u003e \u003c\/span\u003e718 Cayman GTS (982) (2017+)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePorsche 718 Boxster (982) (2016+)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003ePorsche 718 Boxster S (982) (2016+)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePorsche 718 Boxster GTS (982) (2017+)\u003c\/span\u003e\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 class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e\u003cspan\u003eQP505S\u003c\/span\u003e \u003c\/p\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (102mm)","offer_id":58410485318019,"sku":"QP505S-1020CG","price":2382.72,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1018\/6506\/2787\/files\/STONEEXHAUSTPORSCHE928718CAYMANBOXSTERSGTSCAT-BACKVALVETRONICEXHAUSTSYSTEM_INC.2.0T_2.5T__01.jpg?v=1783521055"}],"url":"https:\/\/www.mlperformance.co.uk\/collections\/blog-17-01-2025-cat-back-exhaust.oembed","provider":"MLP","version":"1.0","type":"link"}