{"product_id":"stone-exhaust-bmw-b58-catless-performance-downpipe-inc-m140i-m240i-440i-540i-x5-m40i","title":"Stone Exhaust BMW B58 Performance Catless\/Decat Downpipe | F20 F21 F22 F23 F30 F31 F32 F33 F36 G11 G12 G30 G31 G02 G05 G06 G29 | M140i M240i 340i 440i 540i 740i X3\/X4 M40i X5\/X6 40i Z4 M40i | A214P","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eStone Exhaust B58 Race Decat Front Pipe for BMW | Part A214P\u003c\/h2\u003e\n  \n  \u003cp\u003e\n    Looking for a serious exhaust upgrade for your B58-powered BMW without compromise on fitment or durability? This Stone Exhaust cat delete front section is built to free up turbo flow, sharpen response and unlock a harder, more purposeful soundtrack. Designed around the factory layout for exact alignment, it replaces the restrictive primary catalyst with a smooth, one-piece, high-flow solution developed using 3D scanning, reverse engineering and precision robot welding.\n  \u003c\/p\u003e\n  \n  \u003cp\u003e\n    Compatible across a wide range of 3.0 turbo BMW models and chassis codes including F20 F21 F22 F23 F30 F31 F32 F33 F36 G11 G12 G30 G31 G02 G05 G06 G29, plus M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, X5 40i, X6 40i and Z4 M40i.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhy enthusiasts choose this B58 decat pipe\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCat delete design to maximise exhaust gas velocity and reduce back pressure\u003c\/li\u003e\n    \u003cli\u003eOne-piece CNC bent tubing for a seamless, uninterrupted internal bore\u003c\/li\u003e\n    \u003cli\u003eDedicated flex section helps manage thermal expansion and vibration\u003c\/li\u003e\n    \u003cli\u003eCrisscross, overlapping turbo flange welds strengthen the hottest joint\u003c\/li\u003e\n    \u003cli\u003eRobot-assisted machine welding for consistent penetration and accuracy\u003c\/li\u003e\n    \u003cli\u003eEngineered from 3D scans of OE parts to ensure 100 percent factory-style fit\u003c\/li\u003e\n    \u003cli\u003eBuilt to outperform typical multi-piece or segmented alternatives\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eEngineering that delivers\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone Exhaust validates flow with velocity measurement and 3D simulation, refining routing and transitions until pressure rise is minimised. A 7-axis CNC bending process maintains roundness at tight radii to avoid the ovalisation and internal steps that can disturb gas flow. Mechanical welding arms and direct spot welding create an integrally formed assembly with outstanding repeatability.\n  \u003c\/p\u003e\n  \n  \u003cdiv style=\"margin: 20px 0;\"\u003e\n    \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 B58 decat engineering and 3D scanning - MJ Modifications UK\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv style=\"margin: 20px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\" alt=\"7-axis CNC bending for BMW B58 race pipe - MJ Modifications UK\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv style=\"margin: 20px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_1024x1024.jpg?v=1572828150\" alt=\"Precision robot welding on B58 turbo flange - MJ Modifications UK\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \n  \u003ch3\u003eProven by us\u003c\/h3\u003e\n  \u003cp\u003e\n    We have fitted these Stone Exhaust B58 decat pipes on customer cars and our own shop vehicles at MJ Modifications, and feedback has been consistently excellent. Fitment is spot on, the finish is superb and the performance feel is immediate with crisper spool and a deeper, more engaging tone.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eVehicle compatibility\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eBMW 1 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF20 LCI \/ F21 LCI M140i \/ M140i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW 2 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF22 M240i \/ M240i xDrive\u003c\/li\u003e\n    \u003cli\u003eF22 LCI M240i \/ M240i xDrive\u003c\/li\u003e\n    \u003cli\u003eF23 M240i \/ M240i xDrive\u003c\/li\u003e\n    \u003cli\u003eF23 LCI M240i \/ M240i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW 3 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF30 LCI \/ F31 LCI 340i \/ 340i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW 4 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF32 440i \/ 440i xDrive\u003c\/li\u003e\n    \u003cli\u003eF32 LCI 440i \/ 440i xDrive\u003c\/li\u003e\n    \u003cli\u003eF33 440i \/ 440i xDrive\u003c\/li\u003e\n    \u003cli\u003eF33 LCI 440i \/ 440i xDrive\u003c\/li\u003e\n    \u003cli\u003eF36 440i \/ 440i xDrive\u003c\/li\u003e\n    \u003cli\u003eF36 LCI 440i \/ 440i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW 5 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eG30 540i \/ 540i xDrive\u003c\/li\u003e\n    \u003cli\u003eG31 540i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW 7 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eG11 740i\u003c\/li\u003e\n    \u003cli\u003eG12 740i \/ 740i xDrive\u003c\/li\u003e\n    \u003cli\u003eG12 740Li \/ 740Li xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW X models\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eG02 X4 M40i \/ X3 M40i xDrive\u003c\/li\u003e\n    \u003cli\u003eG05 X5 40i xDrive\u003c\/li\u003e\n    \u003cli\u003eG06 X6 40i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBMW Z series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eG29 Z4 M40i\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eA214P\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003ch3\u003eManufacturer\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust\u003c\/p\u003e\n  \n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust 2-year warranty\u003c\/p\u003e\n  \n  \u003ch3\u003eFitting and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Professional installation, coding advice and post-fit checks available at MJ Modifications in Warwickshire. For a fitting quote or to discuss your B58 exhaust upgrade, email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Tuning calibration is recommended to maximise performance from this hardware.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eImportant notice\u003c\/h3\u003e\n  \u003cp\u003e\n    This is a catless race component intended for off-road and track use only. Check local regulations before purchase.\n  \u003c\/p\u003e\n  \n  \u003cp style=\"margin-top: 20px;\"\u003e\n    Popular searches: B58 decat pipe UK, BMW M140i exhaust upgrade, M240i race pipe, 340i cat delete, 440i free-flow front pipe, 540i high-flow front section, 740i turbo outlet pipe, X3 M40i straight pipe, X4 M40i performance exhaust mod, X5 40i primary cat delete, X6 40i track pipe, Z4 M40i straight-through pipe, F20 F21 F22 F23 F30 F31 F32 F33 F36 front pipe, G11 G12 G30 G31 G02 G05 G06 G29 B58 exhaust upgrade, B58 stage 2 hardware, BMW 3.0 turbo exhaust mod, BMW B58 performance pipe.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Default Title","offer_id":56008708325762,"sku":null,"price":960.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/Stone_Exhaust_BMW_B58_G30_G31_540i_Catless_Performance_Downpipe-1_1946x_a6416e33-f126-43ea-803b-7978a6559a15.png?v=1764091113","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-b58-catless-performance-downpipe-inc-m140i-m240i-440i-540i-x5-m40i","provider":"MJ Modifications","version":"1.0","type":"link"}