{"product_id":"catback-valved-exhaust-for-bmw-m135-m135i-n55-3-0t-2013-2016","title":"F20\/21 M135\/M135i N55 2013-2016 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  }\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\" data-product-accordion\u003e\n\n  \u003c!-- DESCRIPTION --\u003e\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton type=\"button\" class=\"accordion-header\" data-accordion-toggle\u003eDescription\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        \u003cp\u003e\u003cstrong\u003eF20 \/ F21 M135 \/ M135i N55 Valved Catback Exhaust (2013–2016)\u003c\/strong\u003e\u003c\/p\u003e\n\n        \u003cp\u003e\n          Upgrade the sound and performance character of your BMW with the \u003cstrong\u003eValved Catback Exhaust System\u003c\/strong\u003e for the F20 \/ F21 M135 and M135i, engineered specifically for the \u003cstrong\u003eN55 engine\u003c\/strong\u003e. This system enhances the driving experience with a deeper, more aggressive exhaust note while maintaining comfort for everyday use.\n        \u003c\/p\u003e\n\n        \u003cp\u003e\n          The \u003cstrong\u003eintegrated valve control system\u003c\/strong\u003e allows you to adjust the exhaust tone depending on driving conditions. With the valves closed, the system produces a refined and balanced sound suitable for daily driving. Open the valves, and the exhaust delivers a louder, sportier tone with increased presence under acceleration.\n        \u003c\/p\u003e\n\n        \u003cp\u003e\n          As a full \u003cstrong\u003ecatback system\u003c\/strong\u003e, this setup replaces the exhaust from the midpipe back, improving exhaust flow and amplifying the natural sound of the N55 engine. Manufactured from high-quality materials for durability and heat resistance, the system is designed for OEM-style integration and clean installation.\n        \u003c\/p\u003e\n\n        \u003cul\u003e\n          \u003cli\u003eValved catback exhaust system for N55\u003c\/li\u003e\n          \u003cli\u003eAdjustable sound with integrated valve control\u003c\/li\u003e\n          \u003cli\u003eDeep and aggressive tone with valves open\u003c\/li\u003e\n          \u003cli\u003eRefined and controlled sound with valves closed\u003c\/li\u003e\n          \u003cli\u003eImproved exhaust flow and performance sound\u003c\/li\u003e\n          \u003cli\u003eOEM-style fit and seamless integration\u003c\/li\u003e\n        \u003c\/ul\u003e\n\n        \u003cp\u003e\n          \u003cstrong\u003eKavoni Design Quality\u003c\/strong\u003e\u003cbr\u003e\n          At Kavoni Design, we select performance upgrades that combine engineering precision, durability, and driving emotion. This valved catback exhaust system delivers a bold yet refined sound transformation, perfectly suited to the BMW F20 and F21 M135 \/ M135i platform.\n        \u003c\/p\u003e\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 type=\"button\" class=\"accordion-header\" data-accordion-toggle\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  \u003c!-- FITMENT --\u003e\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton type=\"button\" class=\"accordion-header\" data-accordion-toggle\u003eFitment\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        \u003cstrong\u003eBMW 1 Series:\u003c\/strong\u003e F20 \/ F21 M135 \/ M135i (2013–2016)\u003cbr\u003e\n        \u003cstrong\u003eEngine:\u003c\/strong\u003e N55 3.0T\n        \u003cbr\u003e\u003cbr\u003e\n        Designed for direct installation using factory mounting points.\n        \u003cbr\u003e\u003cbr\u003e\n        Professional installation is recommended. If you are unsure about compatibility, please contact our team before ordering.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WARRANTY --\u003e\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton type=\"button\" class=\"accordion-header\" data-accordion-toggle\u003eWarranty\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        This product includes a \u003cstrong\u003e12-month warranty\u003c\/strong\u003e covering 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  \u003c!-- DISCLAIMER --\u003e\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton type=\"button\" class=\"accordion-header\" data-accordion-toggle\u003eDisclaimer\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\n      \u003cdiv class=\"accordion-content-inner\"\u003e\n        This is an aftermarket exhaust component. Professional installation is strongly recommended to ensure optimal fitment and sound.\n        Kavoni Design is not responsible for any damage caused during installation or improper use.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\n  (function () {\n    const root = document.querySelector('[data-product-accordion]');\n    if (!root) return;\n\n    const items = root.querySelectorAll('.accordion-item');\n\n    function closeItem(item) {\n      item.classList.remove('active');\n      const content = item.querySelector('.accordion-content');\n      if (content) content.style.maxHeight = null;\n    }\n\n    function openItem(item) {\n      item.classList.add('active');\n      const content = item.querySelector('.accordion-content');\n      if (content) content.style.maxHeight = content.scrollHeight + 'px';\n    }\n\n    root.querySelectorAll('[data-accordion-toggle]').forEach((btn) =\u003e {\n      btn.addEventListener('click', function () {\n        const item = this.closest('.accordion-item');\n        const isActive = item.classList.contains('active');\n\n        items.forEach((i) =\u003e {\n          if (i !== item) closeItem(i);\n        });\n\n        if (isActive) {\n          closeItem(item);\n        } else {\n          openItem(item);\n        }\n      });\n    });\n\n    window.addEventListener('resize', function () {\n      const active = root.querySelector('.accordion-item.active .accordion-content');\n      if (active) active.style.maxHeight = active.scrollHeight + 'px';\n    });\n  })();\n\u003c\/script\u003e","brand":"kavonidesign","offers":[{"title":"Carbon M","offer_id":57382853640575,"sku":null,"price":1749.95,"currency_code":"EUR","in_stock":true},{"title":"Carbon Kavoni","offer_id":57382853673343,"sku":null,"price":1749.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel Kavoni","offer_id":57382853706111,"sku":null,"price":1749.95,"currency_code":"EUR","in_stock":true},{"title":"Burned Kavoni","offer_id":57382853738879,"sku":null,"price":1749.95,"currency_code":"EUR","in_stock":true},{"title":"Stainless Steel Black Kavoni","offer_id":57382853771647,"sku":null,"price":1749.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/9013\/5679\/files\/catback_F20N55.jpg?v=1765534413","url":"https:\/\/kavonidesign.com\/products\/catback-valved-exhaust-for-bmw-m135-m135i-n55-3-0t-2013-2016","provider":"kavonidesign","version":"1.0","type":"link"}