{"product_id":"bmw-m340i-m440i-g-series-sports-cat","title":"BMW M340i\/M440i xDrive B58 Catted Downpipe - G-Series G20 G21 G22 G23 G26 - 200 CPSI Heat Shielded High-Flow Sports Catalytic Converter, 4.5-inch Stainless Turbo Downpipe Performance Catalyst Exhaust Upgrade","description":"\u003cdiv\u003e\n  \u003ch2\u003eUnlock flow, sound and heat control on your G Series B58\u003c\/h2\u003e\n  \n  \u003cp\u003e\n    Give your BMW M340i or M440i the breathing room it deserves with an insulated 200 CPSI performance catalyst. This catted downpipe features a large 4.5 inch canister and robust stainless construction with an integrated thermal barrier that helps contain radiant heat and keep underbonnet temperatures in check. Expect sharper turbo response and a richer, deeper exhaust note while maintaining a catted solution that suits fast road builds and tuned B58 setups.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhy enthusiasts choose this upgrade\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHigh flow 200 CPSI cat for reduced back pressure and improved spool\u003c\/li\u003e\n    \u003cli\u003eThermal shielding to help manage heat soak and protect nearby components\u003c\/li\u003e\n    \u003cli\u003eHeavy duty stainless fabrication for strength and long term durability\u003c\/li\u003e\n    \u003cli\u003eOversized 4.5 inch body to support increased airflow on remapped cars\u003c\/li\u003e\n    \u003cli\u003eDirect fit for G Series M340i and M440i with the B58 engine\u003c\/li\u003e\n    \u003cli\u003eDelivers a fuller, more aggressive soundtrack without going catless\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eReal world results\u003c\/h3\u003e\n  \u003cp\u003e\n    We have fitted and run this catted downpipe on customer M340i and M440i builds. Feedback has been consistently positive, highlighting the deeper tone, smoother power delivery and noticeably better heat management around the turbo area. It is a popular alternative to decat pipes for drivers wanting performance gains with a quality catalyst in place.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003e\n    Designed for BMW G Series M340i and M440i models equipped with the B58 engine. If you would like us to confirm compatibility with your specific chassis and build, get in touch and we will be happy to help.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eProfessional installation\u003c\/h3\u003e\n  \u003cp\u003e\n    We recommend expert fitting for the best results. MJ Modifications offers installation at our Warwickshire workshop. To request a quote or book your slot, email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhat is included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x insulated 200 CPSI catted downpipe with 4.5 inch body in stainless\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\n    Search terms: BMW M340i catted downpipe, BMW M440i catted downpipe, B58 high flow cat, BMW G Series performance catalyst, G20 G22 exhaust upgrade, 200 CPSI catalyst, heat shielded downpipe, turbo downpipe B58, BMW M340i tuning parts UK, BMW M440i tuning parts UK, stainless catted downpipe, large can sports catalyst, insulated catalyst BMW, M340i exhaust mod, M440i exhaust mod, B58 catted pipe.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Nforcd","offers":[{"title":"Default Title","offer_id":56005377261954,"sku":null,"price":450.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/f6a501_7ff83b55553441b891e25775b4a23561_mv2.jpg?v=1764018451","url":"https:\/\/mjmodifications.co.uk\/products\/bmw-m340i-m440i-g-series-sports-cat","provider":"MJ Modifications","version":"1.0","type":"link"}