{"product_id":"stone-exhaust-bmw-b48d-g20-g21-catless-downpipes-inc-320-330i-opf-model","title":"Stone Exhaust A218P High-Flow Catless Decat Downpipe \/ Turbo Outlet Front Pipe for BMW B48\/B48D G20 G21 3 Series, G22 G23 G26 4 Series, G29 Z4 - OPF\/GPF\/PPF Friendly - 320i 330i 420i 430i 20i 30i xDrive","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eHigh-Flow De-cat Front Pipe for BMW B48D Platforms – OPF GPF Compatible – Part No. A218P\u003c\/h2\u003e\n  \n  \u003cp\u003eGive your B48D-powered BMW the sharp throttle response, quicker boost build and rich turbo soundtrack it deserves with this race-focused de-cat front section from Stone Exhaust. Engineered for the latest BMW petrol particulate filter cars, this turbo outlet pipe replaces the restrictive factory component to improve exhaust gas velocity, reduce back pressure and deliver a more urgent, motorsport-inspired tone while retaining precise factory-style fitment.\u003c\/p\u003e\n  \n  \u003cp\u003ePerfect for drivers who want a serious performance exhaust upgrade on track or closed-course use. We have installed this unit at MJ Modifications for our own vehicles and customer builds, and feedback on fit, finish, sound quality and drivability has been consistently excellent.\u003c\/p\u003e\n\n  \u003ch3\u003eKey reasons enthusiasts choose this upgrade\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDesigned for BMW B48D applications across G-series models with OPF GPF systems\u003c\/li\u003e\n    \u003cli\u003eOne-piece CNC-bent tubing for smooth, uninterrupted gas flow from the turbocharger outlet\u003c\/li\u003e\n    \u003cli\u003eEngineered flex joint to cope with heat cycles and vibration, helping to prevent cracking\u003c\/li\u003e\n    \u003cli\u003eReinforced turbo flange with overlapping welds for long-term durability under high temperature\u003c\/li\u003e\n    \u003cli\u003ePrecision machine and robotic welding for consistent penetration and repeatable quality\u003c\/li\u003e\n    \u003cli\u003e3D-scanned and reverse engineered for OEM-like alignment and clearances\u003c\/li\u003e\n    \u003cli\u003eDirect bolt-on to the factory turbo and OE cat-back interface, no cutting required\u003c\/li\u003e\n    \u003cli\u003eDeveloped using flow velocity measurement and 3D simulation to optimise pressure, gas speed and thermal zones\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eR\u0026amp;D and manufacturing detail\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust uses full 3D scanning of the factory assembly to understand routing, pipe diameters and bend geometry, then iterates designs in simulation to remove restrictions and hot spots. The result is a highly efficient front pipe that improves exhaust efficiency beyond typical aftermarket offerings.\u003c\/p\u003e\n  \u003cp\u003eFormed on a 7‑axis CNC bending machine, the tubing maintains up to 98 percent roundness with only 25 percent outer bore wear even at 180 degree bends, helping to minimise turbulence and reduce weld stress. Direct spot welding via mechanical arms delivers accuracy within 0.025 mm, ensuring a secure seal at the turbo-to-downpipe interface where temperatures can reach approximately 800 to 1100 degrees Celsius.\u003c\/p\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eEngine: BMW B48D petrol turbo\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW 3 Series G20 G21 – 320i 2019+ and 330i 2017+ including xDrive\u003c\/li\u003e\n    \u003cli\u003eBMW 4 Series G22 G23 G26 – 420i and 430i 2020+\u003c\/li\u003e\n    \u003cli\u003eBMW Z4 G29 – 20i and 30i 2019+\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eSuitable for vehicles equipped with OPF GPF PPF systems.\u003c\/p\u003e\n\n  \u003ch3\u003eWhat you can expect\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFaster turbo spool and improved mid-range pull thanks to a freer-flowing turbo outlet\u003c\/li\u003e\n    \u003cli\u003eA deeper, more aggressive tone under load while maintaining excellent cruising refinement\u003c\/li\u003e\n    \u003cli\u003eClean, factory-style installation with all mounting points in the right place\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003eA218P\u003c\/p\u003e\n\n  \u003ch3\u003eBrand and warranty\u003c\/h3\u003e\n  \u003cp\u003eManufacturer: Stone Exhaust\u003c\/p\u003e\n  \u003cp\u003eWarranty: 2 years from Stone Exhaust\u003c\/p\u003e\n\n  \u003ch3\u003eDimensions and weight\u003c\/h3\u003e\n  \u003cp\u003eDimensions: 70 cm x 20 m x 18 cm\u003c\/p\u003e\n  \u003cp\u003eWeight: 2.21 kg\u003c\/p\u003e\n\n  \u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n  \u003cp\u003eWant it installed by specialists in the UK? Book your fitment with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.\u003c\/p\u003e\n\n  \u003ch3\u003eUsage and emissions notice\u003c\/h3\u003e\n  \u003cp\u003eThis product is intended for off-road, track or motorsport use where permitted. Laws vary by region regarding modification or removal of original emissions equipment. It is the purchaser's responsibility to check and comply with all applicable regulations before installation and use.\u003c\/p\u003e\n\n  \u003ch3\u003eAlso searched as\u003c\/h3\u003e\n  \u003cp\u003eBMW B48D de-cat pipe, BMW turbo outlet pipe, G20 G21 3 Series performance exhaust upgrade, G22 G23 G26 4 Series front pipe, G29 Z4 20i 30i exhaust mod, straight-through down pipe, race front section, OPF GPF compatible de-cat, PPF friendly performance pipe, BMW 320i 330i exhaust upgrade UK, BMW 420i 430i tuning part, xDrive petrol performance parts, Stone Exhaust A218P, BMW B48 performance UK, high flow front pipe for B48D.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Default Title","offer_id":56008687092098,"sku":null,"price":930.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/StoneExhaustBMWB48D_B46DG20G29G30CatlessDownpipes_Inc.320_330i_530i_Z420i_Z430iOPFModel_-5-2_1024x1024_2x_95fc5571-2c69-4803-b61b-fbc559a67355.webp?v=1764090745","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-b48d-g20-g21-catless-downpipes-inc-320-330i-opf-model","provider":"MJ Modifications","version":"1.0","type":"link"}