{"product_id":"stone-exhaust-bmw-b46-f22-f30-f34-f32-g20-eddy-catalytic-downpipe-inc-230i-330i-330i-xdrive-gt-430i-520i-530i","title":"Stone Exhaust BMW B46 G20 F22 F30 F32 F34 Eddy Catalytic Downpipe (Inc. 230i, 330i, 330i xDrive GT, 430i, 520i \u0026 530i \/ Non OPF Model)","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eHigh‑flow catted front pipe for BMW B46 2.0 turbo models. More response, more flow, emissions friendly.\u003c\/h2\u003e\n  \u003cp\u003e\n    Unlock extra performance and crisp throttle response from your 2.0 TwinPower Turbo with Stone’s vortex‑style sports catalyst downpipe for non‑OPF cars. This advanced swirl‑cat design accelerates exhaust gas velocity, cleans efficiently at low rpm and flows like a performance cat at higher load. The result is stronger mid‑range pull, quicker spool and a cleaner, sharper driving feel without engine warning lights.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    We run this hardware on our own and customer vehicles and it has been superb. Fitment is spot on, drivability is improved and feedback has been consistently positive.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy this performance downpipe stands out\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eVortex catalyst core. Swirl flow promotes excellent emissions at light load while maintaining high flow when you push on.\u003c\/li\u003e\n    \u003cli\u003eCEL free by design. Optimised O2 sensor placement for correct lambda readings and no EML on compatible vehicles.\u003c\/li\u003e\n    \u003cli\u003eEuro 6 compliant and MOT friendly for non‑OPF applications.\u003c\/li\u003e\n    \u003cli\u003ePremium SUS304 T304 stainless steel resists corrosion and heat cycling.\u003c\/li\u003e\n    \u003cli\u003e7‑axis CNC mandrel bends for smooth, consistent radius and minimal turbulence.\u003c\/li\u003e\n    \u003cli\u003eReinforced turbo outlet flange with cross‑overlap welds for durability at extreme temperatures.\u003c\/li\u003e\n    \u003cli\u003eDirect bolt‑on using factory mounting points. No cutting. No additional fabrication.\u003c\/li\u003e\n    \u003cli\u003ePrecisely engineered from 3D scans of OE parts for true OEM‑style fit.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eEngineering you can trust\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone reverse‑engineers each application with full 3D scanning of the factory system, then models gas dynamics, pressure zones and heat distribution to optimise diameter and routing. The pipework is formed on a 7‑axis CNC bender to maintain roundness through tight radii, then finished with TIG and direct spot welds for strength and consistency. The turbo flange area benefits from criss‑cross weld penetration that stands up to 800 to 1100°C temperature cycles.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFitment guide. BMW 2.0 petrol B46 non‑OPF\u003c\/h3\u003e\n  \u003cp\u003eDesigned for vehicles without a petrol particulate filter PPF OPF. B46 engine family only.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e2 Series\n      \u003cul\u003e\n        \u003cli\u003eF22 230i and 230i xDrive including LCI\u003c\/li\u003e\n        \u003cli\u003eF23 230i Convertible and 230i xDrive including LCI\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e3 Series\n      \u003cul\u003e\n        \u003cli\u003eF30 LCI 330i\u003c\/li\u003e\n        \u003cli\u003eF31 LCI 330i xDrive Touring\u003c\/li\u003e\n        \u003cli\u003eF34 GT LCI 330i xDrive Gran Turismo\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e4 Series\n      \u003cul\u003e\n        \u003cli\u003eF32 LCI 430i and 430i xDrive\u003c\/li\u003e\n        \u003cli\u003eF33 LCI 420i and 430i including xDrive\u003c\/li\u003e\n        \u003cli\u003eF36 LCI 420i 420i xDrive and 430i Gran Coupe\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e5 Series\n      \u003cul\u003e\n        \u003cli\u003eG30 520i\u003c\/li\u003e\n        \u003cli\u003eG30 530i and 530i xDrive\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003eX Models\n      \u003cul\u003e\n        \u003cli\u003eG01 X3 20i xDrive 2017–2018 and X3 30i xDrive 2016–2018\u003c\/li\u003e\n        \u003cli\u003eG02 X4 20i xDrive 2017–2019 and X4 30i xDrive 2017–2019\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eA224E\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eInstallation\u003c\/h3\u003e\n  \u003cp\u003e\n    Direct replacement for the factory turbo outlet pipe on compatible non‑OPF cars. For professional fitting, contact MJ Modifications in Warwickshire for a quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003eBacked by a 2‑year manufacturer warranty.\u003c\/p\u003e\n\n  \u003ch3\u003eImportant notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFor non‑OPF PPF vehicles only.\u003c\/li\u003e\n    \u003cli\u003ePlease check local regulations before modifying your exhaust system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePopular search terms\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW B46 catted downpipe, sports cat front pipe, high flow catalyst B46B20, turbo outlet pipe upgrade, BMW 230i 330i 430i 520i 530i catted pipe, G20 F30 F22 F32 F34 G30 performance exhaust part, CEL free cat, MOT friendly sports catalyst, Euro 6 compliant cat, stainless B46 down pipe, non PPF non OPF BMW 2.0 petrol upgrade, stage 1 stage 2 hardware supporting mod, xDrive compatible front pipe, OEM fit catted pipe, vortex eddy cat technology, UK BMW tuning parts.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Default Title","offer_id":55978582245762,"sku":null,"price":1559.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/StoneLogo1.5_1946x_08c55f19-c3b8-4b92-b89b-06e13e840e47.jpg?v=1763379842","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-b46-f22-f30-f34-f32-g20-eddy-catalytic-downpipe-inc-230i-330i-330i-xdrive-gt-430i-520i-530i","provider":"MJ Modifications","version":"1.0","type":"link"}