.product-accordion { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; max-width: 100%; border-top: 1px solid #e5e5e5; margin-top: 20px; text-align: left; } .accordion-item { border-bottom: 1px solid #e5e5e5; } .accordion-header { background: #fff; color: #000; cursor: pointer; padding: 18px 0; width: 100%; border: none; text-align: left; font-size: 13px; font-weight: bold; letter-spacing: 1.5px; text-transform: uppercase; display: flex; justify-content: space-between; align-items: center; outline: none; } .accordion-header:after { content: '+'; font-size: 18px; color: #000; } .accordion-item.active .accordion-header:after { content: '-'; } .accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out; } .accordion-content-inner { padding: 0 0 25px 0; font-size: 14px; line-height: 1.6; color: #333; } .accordion-content-inner ul { margin: 10px 0; padding-left: 20px; } Description G-Series M3 / M4 Midpipe – Single Midpipe or Equal Length Enhance the sound and performance of your BMW with the Midpipe Upgrade for G-Series M3 and M4 models, available in Single Midpipe or Equal Length configuration. Designed for the S58 engine, this upgrade transforms the factory exhaust tone while improving exhaust flow and overall sound dynamics. The Single Midpipe configuration merges exhaust flow into a larger central pipe, creating a deeper, louder and more aggressive exhaust note. This setup amplifies volume and delivers a raw, performance-focused sound with increased presence under acceleration. The Equal Length configuration balances exhaust pulses from both banks, producing a smoother and more refined exhaust tone. This design reduces harsh frequencies while delivering a cleaner, higher-pitched and more exotic sound profile. Manufactured from high-quality materials for durability and heat resistance, both midpipe options are designed for OEM-style fitment and seamless integration with factory or aftermarket rear exhaust systems. Available in Single Midpipe or Equal Length design Single Midpipe: deeper, louder and more aggressive tone Equal Length: smoother, cleaner and more refined sound Improves exhaust flow and sound dynamics High-quality, heat-resistant construction OEM-style fit and seamless integration Kavoni Design Quality At Kavoni Design, we select performance upgrades that combine engineering precision with driving emotion. This G-Series midpipe system allows you to choose the sound profile that best matches your driving style, delivering a bold yet refined transformation for the BMW M3 and M4 platform. Shipping & Returns This product is made to order. Please allow 12-14 business days for production. Orders are shipped worldwide after production is completed. Worldwide shipping: 6–8 business days Returns are accepted within 14 days of delivery for unused items in original condition. Return shipping costs are the responsibility of the customer. Fitment BMW G80 M3 BMW G82 M4 BMW G83 M4 Engine: S58 Compatible with factory or aftermarket rear exhaust systems. Professional installation is recommended. If you are unsure about compatibility, please contact our team before ordering. Warranty This product includes a 12-month warranty covering manufacturing defects under normal use. Damage caused by improper installation, road debris, or accidents is not covered. Disclaimer This is an aftermarket exhaust component. Professional installation is strongly recommended to ensure optimal fitment and sound. Kavoni Design is not responsible for any damage caused during installation or improper use. (function () { const root = document.querySelector('[data-product-accordion]'); if (!root) return; const items = root.querySelectorAll('.accordion-item'); function closeItem(item) { item.classList.remove('active'); const content = item.querySelector('.accordion-content'); if (content) content.style.maxHeight = null; } function openItem(item) { item.classList.add('active'); const content = item.querySelector('.accordion-content'); if (content) content.style.maxHeight = content.scrollHeight + 'px'; } root.querySelectorAll('[data-accordion-toggle]').forEach((btn) => { btn.addEventListener('click', function () { const item = this.closest('.accordion-item'); const isActive = item.classList.contains('active'); items.forEach((i) => { if (i !== item) closeItem(i); }); if (isActive) { closeItem(item); } else { openItem(item); } }); }); window.addEventListener('resize', function () { const active = root.querySelector('.accordion-item.active .accordion-content'); if (active) active.style.maxHeight = active.scrollHeight + 'px'; }); })();
