{"product_id":"f3x-340i-440i-b58-valved-catback","title":"F3X 340i\/440i B58 Valved Catback Exhaust","description":"\u003cstyle\u003e\n  .product-accordion {\n    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\n    max-width: 100%;\n    border-top: 1px solid #e5e5e5;\n    margin-top: 20px;\n    text-align: left;\n  }\n\n  .accordion-item {\n    border-bottom: 1px solid #e5e5e5;\n  }\n\n  .accordion-header {\n    background: #fff;\n    color: #000;\n    cursor: pointer;\n    padding: 18px 0;\n    width: 100%;\n    border: none;\n    text-align: left;\n    font-size: 13px;\n    font-weight: bold;\n    letter-spacing: 1.5px;\n    text-transform: uppercase;\n    display: flex;\n    justify-content: space-between;\n    align-items: center;\n    outline: none;\n  }\n\n  .accordion-header:after {\n    content: '+';\n    font-size: 18px;\n    color: #000;\n  }\n\n  .accordion-item.active .accordion-header:after {\n    content: '-';\n  }\n\n  .accordion-content {\n    max-height: 0;\n    overflow: hidden;\n    transition: max-height 0.3s ease-out;\n  }\n\n  .accordion-content-inner {\n    padding: 0 0 25px 0;\n    font-size: 14px;\n    line-height: 1.6;\n    color: #333;\n    text-align: left;\n  }\n\n  .accordion-content-inner ul {\n    margin: 10px 0;\n    padding-left: 20px;\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"product-accordion\"\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\" onclick=\"toggleAccordion(this)\"\u003eDescription\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n\n        \u003cstrong\u003eValved Catback Exhaust System\u003c\/strong\u003e\u003cbr\u003e\n        F3X 340i \/ 440i – B58\n        \u003cbr\u003e\u003cbr\u003e\n\n        Unleash the full sound potential of your BMW with the Valved Catback Exhaust System for F3X 340i and 440i B58 models. Engineered for drivers who want complete control, this system delivers an aggressive, performance-driven exhaust note when open, while remaining refined and comfortable when closed.\n        \u003cbr\u003e\u003cbr\u003e\n\n        The valved design allows you to switch between a deep, powerful sound and a more subdued tone, making it ideal for both spirited driving and daily use. Precision-engineered piping improves exhaust flow, enhancing throttle response and overall driving engagement without compromising drivability.\n        \u003cbr\u003e\u003cbr\u003e\n\n        Constructed from high-grade stainless steel and finished with clean, TIG-welded joints, this catback exhaust combines durability with premium craftsmanship. The result is a performance upgrade that looks as good as it sounds.\n        \u003cbr\u003e\u003cbr\u003e\n\n        \u003cstrong\u003eKey Features\u003c\/strong\u003e\n        \u003cul\u003e\n          \u003cli\u003eValved catback exhaust system\u003c\/li\u003e\n          \u003cli\u003eAggressive sound with valve open, refined tone when closed\u003c\/li\u003e\n          \u003cli\u003eImproved exhaust flow and throttle response\u003c\/li\u003e\n          \u003cli\u003eHigh-grade stainless steel construction\u003c\/li\u003e\n          \u003cli\u003ePrecision TIG welding for strength and finish\u003c\/li\u003e\n          \u003cli\u003ePerformance-focused design with OEM-level quality\u003c\/li\u003e\n        \u003c\/ul\u003e\n\n        \u003cstrong\u003eKavoni Design Quality\u003c\/strong\u003e\u003cbr\u003e\n        At Kavoni Design, we focus on performance upgrades that deliver both sound and substance. This valved catback exhaust system is selected to meet our standards for build quality, fitment, and driving experience — offering a powerful yet controlled exhaust upgrade for the B58 platform.\n\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n \u003c!-- SHIPPING --\u003e\n\u003cdiv class=\"accordion-item\"\u003e\n  \u003cbutton class=\"accordion-header\" type=\"button\" onclick=\"toggleAccordion(this)\"\u003eShipping \u0026amp; Returns\u003c\/button\u003e\n  \u003cdiv class=\"accordion-content\"\u003e\n    \u003cdiv class=\"accordion-content-inner\"\u003e\n      This product is made to order. Please allow \u003cstrong\u003e12–14 business days\u003c\/strong\u003e for production.\n      \u003cbr\u003e\u003cbr\u003e\n      Orders are shipped worldwide after production is completed.\n      \u003cul\u003e\n        \u003cli\u003e\u003cstrong\u003eWorldwide shipping: 6–8 business days\u003c\/strong\u003e\u003c\/li\u003e\n      \u003c\/ul\u003e\n      Returns are accepted within \u003cstrong\u003e14 days of delivery\u003c\/strong\u003e for unused items in original condition. Return shipping costs are the responsibility of the customer.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\" onclick=\"toggleAccordion(this)\"\u003eFitment\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        Not sure if it will fit your vehicle? Contact our sales team and we will be happy to help you locate the correct part for your vehicle.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\" onclick=\"toggleAccordion(this)\"\u003eWarranty\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        Every product from \u003cstrong\u003eKavoni Design\u003c\/strong\u003e comes with a \u003cstrong\u003e12-month warranty\u003c\/strong\u003e. This warranty covers manufacturing defects under normal use. Damage caused by improper installation, road debris, or accidents is not covered.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\" onclick=\"toggleAccordion(this)\"\u003eDisclaimer\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        Please note that these are aftermarket parts and are not original manufacturer equipment. While we strive for perfect fitment, professional installation is highly recommended. \u003cstrong\u003eKavoni Design\u003c\/strong\u003e is not responsible for any damages incurred during installation.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\n  function toggleAccordion(element) {\n    const item = element.parentElement;\n    const content = element.nextElementSibling;\n\n    const allItems = document.querySelectorAll('.accordion-item');\n    allItems.forEach(i =\u003e {\n      if (i !== item) {\n        i.classList.remove('active');\n        i.querySelector('.accordion-content').style.maxHeight = null;\n      }\n    });\n\n    item.classList.toggle('active');\n    if (item.classList.contains('active')) {\n      content.style.maxHeight = content.scrollHeight + \"px\";\n    } else {\n      content.style.maxHeight = null;\n    }\n  }\n\u003c\/script\u003e","brand":"kavonidesign","offers":[{"title":"Stainless Steel \/ Carbon M","offer_id":56555385553279,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel \/ Carbon Kavoni","offer_id":57220387537279,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel \/ Stainless Steel Kavoni","offer_id":57220387570047,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel \/ Burned Kavoni","offer_id":57220387602815,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel \/ Stainless Steel Black Kavoni","offer_id":57220387635583,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Titanium \/ Carbon M","offer_id":56555385291135,"sku":null,"price":2549.95,"currency_code":"EUR","in_stock":true},{"title":"Titanium \/ Carbon Kavoni","offer_id":57220387668351,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Titanium \/ Stainless Steel Kavoni","offer_id":57220387701119,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Titanium \/ Burned Kavoni","offer_id":57220387733887,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true},{"title":"Titanium \/ Stainless Steel Black Kavoni","offer_id":57220387766655,"sku":null,"price":1699.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/9013\/5679\/files\/Catback_Exhaust_for_BMW_340_340i_440_440i_3.0T_2016-2023_Stainless_Steel_Exhaust.png?v=1765543127","url":"https:\/\/kavonidesign.com\/products\/f3x-340i-440i-b58-valved-catback","provider":"kavonidesign","version":"1.0","type":"link"}