{"product_id":"mad-bmw-m340-m440-axleback-exhaust-g20-g22","title":"MAD BMW M340 M440 Axleback Exhaust (G20 \u0026 G22)","description":"\u003cdiv class=\"flex flex-grow flex-col gap-3\"\u003e\r\r\n\u003cdiv class=\"min-h-[20px] flex items-start overflow-x-auto whitespace-pre-wrap break-words flex-col gap-4\"\u003e\r\r\n\u003cdiv class=\"markdown prose w-full break-words dark:prose-invert light\"\u003e\r\r\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\r\r\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"b550e465-a1ca-4549-b818-1394737578bf\" data-message-model-slug=\"gpt-5-2\"\u003e\r\r\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\r\r\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\r\r\n\u003cdiv class=\"l4lQedPGf8KN1w\" role=\"button\"\u003e\r\r\n\u003cdiv class=\"_4MrlvXRZe6dnu\" data-testid=\"comment-container\"\u003e\r\r\n\u003cdiv class=\"R1RfC8jJFTMJlv Xfg5GTUiZ1tTRp\"\u003e\r\r\n\u003cdiv class=\"kMMW7ykMIXwcjQ Ijf59q3IL0JsER\"\u003e\r\r\n\u003cdiv\u003e\r\r\n\u003cdiv class=\"uilHrMFcZTKnuh\"\u003e\r\r\n\u003cdiv class=\"ak-renderer-wrapper is-full-width css-1jke4yk\"\u003e\r\r\n\u003cdiv class=\"css-1cps1jb\"\u003e\r\r\n\u003cdiv class=\"ak-renderer-document\"\u003e\r\r\n\u003cp data-renderer-start-pos=\"4\"\u003eThe MAD BMW M340 M440 Axle Back Exhaust System is designed to deliver a bold sound upgrade without unnecessary parts or added cost. On this platform, a full catback is simply not needed. The factory midpipe is already a single design and is completely non-restrictive, with no cats and no resonators. Replacing it with another single midpipe offers no real performance or sound benefit, so this system focuses where it actually matters: the axle back.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"457\"\u003eThis axle back setup dramatically improves sound and character while keeping the factory midpipe in place, making it a smarter and more efficient upgrade. It gives the car a deeper, more aggressive tone when pushed, while staying refined and comfortable during normal driving.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"735\"\u003eThe system includes three tip options. Available finishes are brushed stainless, black, or carbon, allowing you to tailor the look to your build.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"882\"\u003eInstallation is quick and straightforward. As with most axle back systems, cutting the factory pipe is required. The process is very simple, takes minimal time, and the provided clamps make installation clean and secure.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"1104\"\u003eThe exhaust is constructed from high-quality 304L stainless steel for excellent durability and long-term corrosion resistance.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"1232\"\u003eAn upgraded dual valve configuration converts the factory single valve setup into a true dual valve system similar to M models. The factory valve actuator is reused, with an additional valve added on the opposite side. This allows the exhaust to function perfectly with OEM drive modes, staying quiet in Comfort and opening up fully in Sport.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"1576\"\u003eThis axle back is ideal for drivers who want a noticeable sound upgrade, strong presence, and clean fitment without paying for parts that do not add value.\u003c\/p\u003e\r\r\n\u003cp data-renderer-start-pos=\"1733\"\u003e\u003cstrong data-renderer-mark=\"true\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\r\r\n\u003cul class=\"ak-ul\" data-indent-level=\"1\"\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"1746\"\u003eSlip on axle back design for BMW M340i and M440i.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"1799\"\u003eDramatic sound improvement while keeping factory midpipe in place.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"1869\"\u003eIncluded extra Valve motor and harness for a true dual M-style exhaust valve control.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"1958\"\u003eRetains OEM drive modes: quiet in Comfort, fully open in Sport.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"2025\"\u003eThree tip options: brushed stainless, black, or carbon.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"2084\"\u003eConstructed from premium 304L stainless steel for corrosion resistance and longevity.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"2173\"\u003eQuick and straightforward installation with included clamps.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003cli\u003e\r\r\n\u003cp data-renderer-start-pos=\"2237\"\u003eNo unnecessary components, making it a cost-effective, value-focused upgrade.\u003c\/p\u003e\r\r\n\u003c\/li\u003e\r\r\n\u003c\/ul\u003e\r\r\n\u003cp data-renderer-start-pos=\"2318\"\u003e\u003cstrong data-renderer-mark=\"true\"\u003eFitment includes\u003c\/strong\u003e\u003cbr\u003eBMW M340i and M440i 2018 and up including G20 and G22\u003cbr\u003eBMW M340i and M440i 2025 and newer models\u003cbr\u003eCompatible with rear wheel drive and xDrive models\u003c\/p\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003cdiv class=\"k0CzrlJuI35cY8\"\u003e\r\r\n\u003cdiv class=\"rHlYGFm93Wv4G0\"\u003e\r\r\n\u003cdiv class=\"YcJ2wT8lLQ7wY6 oPz6HcNyhzuU0Y MMIj7U7I2Pzhmo\"\u003e \u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\r\r\n\u003c\/div\u003e\u003c!--wheel-specs--\u003e\u003ch3\u003eWheel Specs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTips:\u003c\/strong\u003e Brushed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e MAD-147 + MAD-147-BR\u003c\/li\u003e\n\u003c\/ul\u003e\u003c!--\/wheel-specs--\u003e","brand":"Mastery of Art and Design","offers":[{"title":"Brushed","offer_id":47901200744666,"sku":"MAD-147 + MAD-147-BR","price":1229.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2306\/1978\/files\/WhatsApp_Image_2025-10-10_at_12.45.31_f6cad5c3__94391.1771263885.386.513.jpg?v=1779312006","url":"https:\/\/www.zero-offset.com\/products\/mad-bmw-m340-m440-axleback-exhaust-g20-g22","provider":"Zero Offset","version":"1.0","type":"link"}