{"product_id":"stone-exhaust-bmw-b48-g30-g31-cat-back-valvetronic-exhaust-system-520i-530i","title":"Stone Exhaust BMW B48 G30 G31 520i OEM Integrated Valved Catback Exhaust System","description":"\u003cp class=\"unreset\"\u003eThis Exhaust System is often purchased with the \u003cspan style=\"color: #2b00ff;\"\u003e\u003cstrong style=\"color: #2b00ff;\"\u003e\u003cb\u003e\u003ca href=\"\/products\/stone-exhaust-bmw-b48-g20-g30-catless-performance-downpipe-330i-520i-530i\" title=\"Stone Exhaust BMW B48 G20 G30 Catless Performance Downpipe (330i, 520i \u0026amp; 530i) - ML Performance US\" style=\"color: #2b00ff;\" target=\"_blank\"\u003eStone Exhaust BMW B48 G20 G30 Catless Performance Downpipe (330i, 520i \u0026amp; 530i)\u003c\/a\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003cstrong style=\"color: #2b00ff;\"\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/strong\u003e\u003c\/span\u003eor the \u003ca href=\"\/products\/stone-exhaust-bmw-b48-g20-g30-eddy-catalytic-performance-downpipe-330i-520i-530i\" title=\"Stone Exhaust BMW B48 G20 G30 Eddy Catalytic Performance Downpipe (330i, 520i \u0026amp; 530i) - ML Performance US\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline; color: #2b00ff;\"\u003e\u003cstrong\u003eStone Exhaust BMW B48 G20 G30 Eddy Catalytic Performance Downpipe (330i, 520i \u0026amp; 530i)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eStone Exhaust\u003cspan\u003e Cat-Back Valvetronic Exhaust System\u003c\/span\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e(520i)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBMW G30 B48 520i STONE EXHAUST Turboback Sound \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/tufMSsCZP6w\" height=\"480\" width=\"854\" data-mce-src=\"https:\/\/www.youtube.com\/embed\/tufMSsCZP6w\" 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\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 B48 G30 G31 520i. \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\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 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: 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 US\" 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 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\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTONE Valvetronic BMW B48 \u003cspan\u003eG30\/G31 520i \u0026amp; 530i\u003c\/span\u003e\n\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\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility - B48 Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBMW 5 Series\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eG30 520i (2016-2019)\u003c\/li\u003e\n\u003cli\u003eG31 520i (2016-2019)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"unreset\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStone Exhaust 2 Year Warranty\u003c\/span\u003e\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\u003cbr\u003e\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\"\u003eAP527A (\u003cspan data-mce-fragment=\"1\"\u003eRequire Original Bumper\u003c\/span\u003e)\u003c\/p\u003e","brand":"Stone Exhaust","offers":[{"title":"Dual Exit with Quad Tailpipes (Require Original Bumper) \/ Flat Cut Gloss Carbon Fiber (102mm)","offer_id":48679173193953,"sku":"AP527A -1020CG","price":3186.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/7608\/4961\/files\/STONEEXHAUSTBMWB48G30G31CAT-BACKVALVETRONICEXHAUSTSYSTEM_520I_530I__01_6b1978ad-09c1-45d1-b8e7-f0318b781990.jpg?v=1784822200","url":"https:\/\/mlperformanceusa.com\/products\/stone-exhaust-bmw-b48-g30-g31-cat-back-valvetronic-exhaust-system-520i-530i","provider":"ML Performance USA","version":"1.0","type":"link"}