{"product_id":"stone-exhaust-bmw-b46d-g20-g29-g30-eddy-catalytic-downpipe-inc-320-330i-530i-z4-20i-z4-30i","title":"Stone Exhaust High-Flow Catted Downpipe \/ Sport Cat Front Pipe for BMW B46D G20 G21 G22 G23 G26 G30 G01 G02 (320i 330i 420i 430i 530i X3\/X4 20i\/30i) OPF\/GPF | Euro 6 UK MOT Friendly | No CEL | SUS304 Stainless | Performance Catalytic Converter | A224NE","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003ePerformance Sport Cat Front Pipe for BMW B46D G-Series Petrol Models\u003c\/h2\u003e\n  \u003cp\u003e\n    Give your 2.0 turbo BMW the response, torque and flow it deserves while keeping emissions in check. This high-efficiency sport catalyst uses Stone’s vortex-core technology to clean exhaust gases and reduce back pressure for punchier acceleration and stronger mid-range pull on OPF and GPF-equipped cars. Designed to work without dashboard warning lights on compatible vehicles and to remain MOT friendly. Part number: \u003cstrong\u003eA224NE\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy enthusiasts choose it\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eVortex catalytic core for serious flow with clean exhaust output on petrol particulate filter cars\u003c\/li\u003e\n    \u003cli\u003eCalibrated oxygen sensor placement to maintain accurate fuelling and avoid error codes on supported setups\u003c\/li\u003e\n    \u003cli\u003eMeets modern emissions standards while unlocking performance on daily-driven and tuned vehicles\u003c\/li\u003e\n    \u003cli\u003eSUS304 stainless construction for longevity and corrosion resistance in UK weather\u003c\/li\u003e\n    \u003cli\u003eDirect-fit front catalyst section with factory-style connections for an easy bolt-on upgrade\u003c\/li\u003e\n    \u003cli\u003eReinforced turbo flange and deep-penetration welds for reliability under high heat and boost\u003c\/li\u003e\n    \u003cli\u003eOptimised tubing diameter and smooth routing to maximise turbine efficiency and reduce lag\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eEngineering that delivers\u003c\/h3\u003e\n  \u003cp\u003e\n    Developed from full 3D scans of the OEM assembly across multiple G-series platforms, the pipe geometry is refined using flow, temperature and pressure modelling to minimise restriction where it matters most. Precision CNC bending keeps the tube round through tight arcs, while accurately formed sections and robotic welding ensure repeatable fit and airtight seams.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eMulti-axis CNC mandrel bends for excellent roundness through tight 180 degree turns\u003c\/li\u003e\n    \u003cli\u003eTightly controlled manufacturing tolerances to reduce turbulence and improve gas speed\u003c\/li\u003e\n    \u003cli\u003eCrisscross and overlapping TIG weld techniques for long-term strength\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n  \u003cp\u003e\n    For BMW B46D 2.0 turbo petrol with OPF and GPF across the following G-series chassis:\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e3 Series: G20 and G21 320i and 330i, including xDrive\u003c\/li\u003e\n    \u003cli\u003e4 Series: G22, G23 and G26 420i and 430i, including xDrive\u003c\/li\u003e\n    \u003cli\u003e5 Series: G30 530i xDrive\u003c\/li\u003e\n    \u003cli\u003eSAV and SAC: G01 X3 20i and 30i, G02 X4 20i and 30i, including xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReal-world results\u003c\/h3\u003e\n  \u003cp\u003e\n    We have supplied and installed this sport cat on multiple B46D-powered cars and the feedback is consistently positive. Owners report quicker spool, a meatier mid-range and a freer top end, with a tasteful increase in tone. The refined catalyst design keeps things civil for daily use on OPF-equipped vehicles.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eInstallation and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Direct replacement for the factory front catalyst section. Professional fitting recommended. For installation, book with MJ Modifications in Warwickshire. Request a quote at \n    \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMaterial: SUS304 stainless steel\u003c\/li\u003e\n    \u003cli\u003eEmissions: Euro 6 friendly design for OPF and GPF cars\u003c\/li\u003e\n    \u003cli\u003eElectronics: Designed to run without dash warnings on compatible vehicles\u003c\/li\u003e\n    \u003cli\u003ePart number: \u003cstrong\u003eA224NE\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eManufacturer: Stone Exhaust\u003c\/li\u003e\n    \u003cli\u003eWarranty: 2 years from Stone Exhaust\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eBuyer notes\u003c\/h3\u003e\n  \u003cp\u003e\n    Laws differ by region. Outside the UK, please check local regulations before purchase and installation. The buyer is responsible for compliance where they drive.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eSearch-friendly terms\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW B46D sport cat, BMW G20 front pipe, BMW 320i 330i catalytic upgrade, G21 performance catalyst, G22 G23 G26 420i 430i cat pipe, G30 530i xDrive sport catalyst, G01 X3 20i 30i catted front pipe, G02 X4 20i 30i catted pipe, OPF GPF compatible catalyst, UK MOT compliant sport cat, stainless cat section, turbo outlet pipe, cat upgrade B46, performance catalyst for BMW 2.0 turbo, error light free design, A224NE.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Default Title","offer_id":56008742240642,"sku":null,"price":1559.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/StoneExhaustBMWB46DG20G22G30EddyCatalyticDownpipe_Inc.320_330i_530ix_X320iOPFModel_1946x_5fb35886-1fc9-4f6a-b5e7-8836728efa16.png?v=1764091698","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-b46d-g20-g29-g30-eddy-catalytic-downpipe-inc-320-330i-530i-z4-20i-z4-30i","provider":"MJ Modifications","version":"1.0","type":"link"}