{"product_id":"stone-exhaust-bmw-b46d-g20-g29-g30-catless-downpipes-inc-320-330i-530i-z4-20i-z4-30i","title":"Stone Exhaust Performance Catless\/Decat Downpipe A224NP for BMW G-Series B46\/B46D (G20 G21 G22 G23 G26 G30 G01 G02) 320i 330i 420i 430i 530i xDrive X3\/X4 20i 30i - OPF\/GPF Compatible","description":"\u003cdiv\u003e\n  \u003ch2\u003eBMW G‑Chassis B46 and B46D Turbo Down Pipe Upgrade - Part Number A224NP\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Transform throttle response, unlock turbo efficiency and add a sharper soundtrack with this high-flow de-cat front pipe designed for BMW petrol particulate filter models. Part number \u003cstrong\u003eA224NP\u003c\/strong\u003e is purpose-built for G‑series 3 Series, 4 Series, 5 Series and X models running the B46\/B46D engine, including vehicles fitted with OPF or GPF.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Expect noticeably quicker spool, reduced back pressure and an OE-style fit that installs cleanly while delivering a more engaging drive. We have used this part extensively and our customers consistently praise the quality, weld finish and the livelier feel once fitted.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy enthusiasts choose A224NP\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCat-delete design that maximises gas velocity for improved turbo performance\u003c\/li\u003e\n    \u003cli\u003eSingle-section, mandrel-formed tubing for uninterrupted flow and reliability\u003c\/li\u003e\n    \u003cli\u003eMechanised precision welding for consistent penetration and joint strength\u003c\/li\u003e\n    \u003cli\u003eReinforced turbo flange with crisscross and overlapping welds for heat resilience\u003c\/li\u003e\n    \u003cli\u003eIntegrated flex section helps control movement and reduce stress under high temperature\u003c\/li\u003e\n    \u003cli\u003eReverse-engineered from factory parts to maintain mounting geometry\u003c\/li\u003e\n    \u003cli\u003e7-axis CNC bending for exceptional roundness and smooth internal radii\u003c\/li\u003e\n    \u003cli\u003eDirect bolt-on fit using OEM locations for a hassle-free install\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eEngineered for flow and longevity\u003c\/h3\u003e\n  \u003cp\u003e\n    Using detailed 3D scanning and flow simulation, the pipe diameter, route and bend angles have been optimised to help the turbine work more efficiently. The one-piece layout minimises welds that can disturb flow, and the reinforced flange plus flex section are designed to cope with thermal expansion during hard use.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e BMW B46 and B46D\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eBMW 3 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eG20 320i xDrive and rear-wheel drive \/ 330i xDrive and rear-wheel drive 2017+\u003c\/li\u003e\n    \u003cli\u003eG21 320i xDrive and rear-wheel drive \/ 330i xDrive and rear-wheel drive 2018+\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\u003eG22 420i xDrive and rear-wheel drive \/ 430i xDrive and rear-wheel drive 2020+\u003c\/li\u003e\n    \u003cli\u003eG23 420i xDrive and rear-wheel drive \/ 430i xDrive and rear-wheel drive 2020+\u003c\/li\u003e\n    \u003cli\u003eG26 420i xDrive and rear-wheel drive \/ 430i xDrive and rear-wheel drive 2020+\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 530i xDrive 2019+\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\u003eG01 X3 20i xDrive and rear-wheel drive \/ 30i xDrive and rear-wheel drive 2017+\u003c\/li\u003e\n    \u003cli\u003eG02 X4 20i xDrive and rear-wheel drive \/ 30i xDrive and rear-wheel drive 2017+\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eTechnical highlights\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e3D-scanned and reverse-engineered from OEM hardware for precise alignment\u003c\/li\u003e\n    \u003cli\u003eFlow analysis focused on velocity and turbine efficiency\u003c\/li\u003e\n    \u003cli\u003e7-axis CNC bending with high roundness retention on tight radii\u003c\/li\u003e\n    \u003cli\u003eAutomated spot welding for accuracy and repeatability\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat our workshop thinks\u003c\/h3\u003e\n  \u003cp\u003e\n    We have installed this A224NP de-cat pipe on multiple B46 and B46D builds across G20, G22 and G01 platforms. Fitment is consistently OE-like, the welds are tidy and repeatable, and the driveability improvement from lower back pressure is exactly what our customers want from a premium down pipe upgrade.\n  \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\u003e2 Year Manufacturer Warranty\u003c\/p\u003e\n\n  \u003ch3\u003eFitting\u003c\/h3\u003e\n  \u003cp\u003e\n    Professional installation recommended. For fitting in the UK, 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\u003eEmissions and legal notice\u003c\/h3\u003e\n  \u003cp\u003e\n    De-cat components may not be road legal in all regions. Check local regulations and MOT requirements before purchase and installation. The buyer is responsible for ensuring compliance with applicable laws where the product is used.\n  \u003c\/p\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eA224NP\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eSearch terms to help you find the right upgrade\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW B46 de-cat pipe, BMW B46D turbo front pipe, BMW G‑chassis petrol particulate filter compatible down pipe, BMW 320i turbo down pipe upgrade, BMW 330i de-cat front pipe, BMW 420i performance front pipe, BMW 430i turbo outlet pipe, BMW 530i exhaust front section, BMW X3 20i down pipe, BMW X4 30i decat, G20 G21 G22 G23 G26 G30 G01 G02 front pipe, catalyst delete pipe BMW, OPF compatible de-cat, GPF compatible de-cat, BMW 2.0 turbo downpipe, B46 tuning pipe, BMW 3 Series 4 Series 5 Series down pipe, high flow turbo pipe BMW, A224NP BMW, B46 de-cat UK, petrol particulate filter model down pipe, G‑series front pipe upgrade, BMW B46 decat UK, B46D downpipe upgrade, BMW 320i 330i 420i 430i 530i downpipe, XDrive and RWD compatible downpipe, Stage 2 B46 search, BMW G20 exhaust upgrade search.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Default Title","offer_id":56008683258242,"sku":null,"price":930.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/StoneExhaustBMWB46DG20G22G30CatlessDownpipes_Inc.320_330i_530ix_X320iOPFModel_1946x_fe503472-2837-4e69-bd18-1d64dc121e6d.png?v=1764090673","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-b46d-g20-g29-g30-catless-downpipes-inc-320-330i-530i-z4-20i-z4-30i","provider":"MJ Modifications","version":"1.0","type":"link"}