{"product_id":"stainless-steel-exhaust-system-bmw-m340i-m440i","title":"Stainless Steel Exhaust System | BMW M340i\/M440i","description":"\u003c!-- CarBahn compact audio widget --\u003e\n\u003cdiv class=\"cb-audio-widget\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/m340i-exhaust.mp3?v=1758229061\"\u003e\n\u003cbutton class=\"cb-audio-play\" aria-label=\"Play exhaust demo\" type=\"button\"\u003e▶ Hear this exhaust\u003c\/button\u003e \u003cinput class=\"cb-audio-seek\" type=\"range\" min=\"0\" max=\"100\" step=\"0.1\" value=\"0\" aria-label=\"Seek\"\u003e \u003cspan class=\"cb-audio-time\" aria-live=\"polite\"\u003e0:00\u003c\/span\u003e \u003ca class=\"cb-audio-fallback\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/m340i-exhaust.mp3?v=1758229061\" rel=\"noopener\" target=\"_blank\"\u003eOpen audio\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .cb-audio-widget{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}\n  .cb-audio-play{background:#e1122f;color:#fff;border:0;border-radius:8px;padding:.5rem .75rem;font:600 14px\/1.2 system-ui;cursor:pointer}\n  .cb-audio-play[disabled]{opacity:.6;cursor:not-allowed}\n  .cb-audio-seek{flex:1;min-width:150px}\n  .cb-audio-time{min-width:42px;text-align:right;font:500 13px\/1.2 system-ui;color:#ddd}\n  .cb-audio-fallback{font:500 13px\/1.2 system-ui}\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cstyle\u003e\n  .cb-audio-widget{\n    display:flex; align-items:center; gap:10px;\n    font: 14px\/1.2 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;\n    border:1px solid #e5e7eb; border-radius:10px; padding:8px 10px;\n    max-width:520px; height:64px; box-sizing:border-box;\n    background:#fff;\n  }\n  .cb-audio-play{\n    flex:0 0 auto; cursor:pointer; border:0; border-radius:999px;\n    padding:8px 12px; background:#000; color:#fff; font-weight:600;\n  }\n  .cb-audio-seek{\n    -webkit-appearance:none; appearance:none; width:100%; height:6px; background:#eee; border-radius:999px; outline:none;\n  }\n  .cb-audio-seek::-webkit-slider-thumb{\n    -webkit-appearance:none; appearance:none; width:14px; height:14px; border-radius:50%; background:#000; cursor:pointer; margin-top:-4px;\n  }\n  .cb-audio-seek::-moz-range-thumb{ width:14px; height:14px; border:none; border-radius:50%; background:#000; cursor:pointer; }\n  .cb-audio-time{ flex:0 0 auto; min-width:42px; text-align:right; color:#374151; }\n  .cb-audio-fallback{ margin-left:auto; font-size:12px; color:#6b7280; text-decoration:underline; }\n  \/* Optional: dark mode-friendly *\/\n  @media (prefers-color-scheme: dark){\n    .cb-audio-widget{ background:#0b0b0b; border-color:#1f2937; }\n    .cb-audio-seek{ background:#1f2937; }\n    .cb-audio-time{ color:#9ca3af; }\n    .cb-audio-fallback{ color:#9ca3af; }\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 data-start=\"183\" data-end=\"265\"\u003eCarBahn Stainless Steel High-Flow Exhaust System – BMW M340i \/ M440i (Cat-Back)\u003c\/h2\u003e\n\u003cp data-start=\"267\" data-end=\"677\"\u003eUnlock the full potential of your BMW M340i or M440i with the \u003cstrong data-start=\"329\" data-end=\"381\"\u003eCarBahn Stainless Steel High-Flow Exhaust System\u003c\/strong\u003e — a true cat-back upgrade engineered to deliver the ideal mix of motorsport character and daily-driver refinement. Designed and specified by Steve Dinan and the CarBahn engineering team, this system reflects decades of tuning experience and an uncompromising commitment to OEM-level quality.\u003c\/p\u003e\n\u003cp data-start=\"679\" data-end=\"1122\"\u003eCrafted entirely from \u003cstrong data-start=\"701\" data-end=\"744\"\u003ecorrosion-resistant 304 stainless steel\u003c\/strong\u003e with a clean \u003cstrong data-start=\"758\" data-end=\"776\"\u003ebrushed finish\u003c\/strong\u003e, the CarBahn exhaust is built to withstand years of heat cycles, weather exposure, and hard driving without rusting or discoloration. Unlike basic axle-back muffler swaps, this is a complete cat-back system engineered to improve exhaust flow, reduce backpressure, and bring out the true sound and responsiveness of BMW’s turbocharged inline-six.\u003c\/p\u003e\n\u003cp data-start=\"1124\" data-end=\"1373\"\u003eThe result is a deep, powerful exhaust note that wakes up under throttle — aggressive when you want it, composed when you don’t. Cruising remains smooth and drone-free, making this system just as rewarding on a road trip as it is on a backroad pull.\u003c\/p\u003e\n\u003ch3 data-start=\"1375\" data-end=\"1429\"\u003eEngineered Fitment — Not Generic Overseas Hardware\u003c\/h3\u003e\n\u003cp data-start=\"1431\" data-end=\"1833\"\u003eCarBahn systems aren’t mass-produced, one-size-fits-all imports. This exhaust is built to \u003cstrong data-start=\"1521\" data-end=\"1559\"\u003eCarBahn-specified design standards\u003c\/strong\u003e, offering superior fitment and consistency compared to many overseas alternatives. Every detail is engineered for a tight, precise installation — from the alignment to the sealing surfaces — ensuring the system performs like an OEM component, not an aftermarket compromise.\u003c\/p\u003e\n\u003ch3 data-start=\"1835\" data-end=\"1875\"\u003ePremium Hardware and Quiet Precision\u003c\/h3\u003e\n\u003cp data-start=\"1877\" data-end=\"2231\"\u003eKey upgrades include \u003cstrong data-start=\"1898\" data-end=\"1920\"\u003eOEM-quality clamps\u003c\/strong\u003e and an advanced exhaust flapper valve design that uses a \u003cstrong data-start=\"1978\" data-end=\"2010\"\u003ehigh-tech anti-rattle spring\u003c\/strong\u003e, dramatically reducing unwanted noise and vibration. The system also incorporates a \u003cstrong data-start=\"2095\" data-end=\"2121\"\u003ejoggle-slot connection\u003c\/strong\u003e, improving sealing at the joints and preventing the small leaks that can plague lower-quality exhaust setups.\u003c\/p\u003e\n\u003ch3 data-start=\"2233\" data-end=\"2250\"\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2254\" data-end=\"2332\"\u003e\n\u003cstrong data-start=\"2254\" data-end=\"2282\"\u003eCarBahn-specified design\u003c\/strong\u003e, engineered by Steve Dinan for the B58 platform\u003c\/li\u003e\n\u003cli data-start=\"2335\" data-end=\"2438\"\u003e\n\u003cstrong data-start=\"2335\" data-end=\"2381\"\u003eFull stainless steel cat-back construction\u003c\/strong\u003e — not just mufflers — for real performance improvement\u003c\/li\u003e\n\u003cli data-start=\"2441\" data-end=\"2523\"\u003e\n\u003cstrong data-start=\"2441\" data-end=\"2473\"\u003eBrushed 304 stainless finish\u003c\/strong\u003e for long-term durability and premium appearance\u003c\/li\u003e\n\u003cli data-start=\"2526\" data-end=\"2607\"\u003e\n\u003cstrong data-start=\"2526\" data-end=\"2558\"\u003eImproved fitment and quality\u003c\/strong\u003e compared to overseas-manufactured alternatives\u003c\/li\u003e\n\u003cli data-start=\"2610\" data-end=\"2686\"\u003e\n\u003cstrong data-start=\"2610\" data-end=\"2638\"\u003eJoggle-slot joint design\u003c\/strong\u003e for superior sealing and connection integrity\u003c\/li\u003e\n\u003cli data-start=\"2689\" data-end=\"2758\"\u003e\n\u003cstrong data-start=\"2689\" data-end=\"2711\"\u003eOEM-quality clamps\u003c\/strong\u003e for factory-level installation and longevity\u003c\/li\u003e\n\u003cli data-start=\"2761\" data-end=\"2850\"\u003e\n\u003cstrong data-start=\"2761\" data-end=\"2795\"\u003eUpgraded exhaust flapper valve\u003c\/strong\u003e with anti-rattle spring technology for reduced noise\u003c\/li\u003e\n\u003cli data-start=\"2853\" data-end=\"2931\"\u003e\n\u003cstrong data-start=\"2853\" data-end=\"2885\"\u003eAggressive yet refined sound\u003c\/strong\u003e with \u003cstrong data-start=\"2891\" data-end=\"2905\"\u003ezero drone\u003c\/strong\u003e during highway cruising\u003c\/li\u003e\n\u003cli data-start=\"2934\" data-end=\"2993\"\u003e\n\u003cstrong data-start=\"2934\" data-end=\"2960\"\u003eDirect bolt-on fitment\u003c\/strong\u003e for BMW M340i and M440i models\u003c\/li\u003e\n\u003cli data-start=\"2996\" data-end=\"3041\"\u003e\u003cstrong data-start=\"2996\" data-end=\"3039\"\u003e2-year unlimited mileage parts warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"3044\" data-end=\"3089\"\u003e\n\u003cstrong data-start=\"3044\" data-end=\"3065\"\u003eUSA-based support\u003c\/strong\u003e from the CarBahn team\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3091\" data-end=\"3094\"\u003e\n\u003cp data-start=\"3096\" data-end=\"3318\"\u003eElevate your BMW’s sound, performance, and character with an exhaust system designed to do more than just turn heads — it’s engineered to make every drive feel sharper, louder, and more alive… the way Steve Dinan intended.\u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":53314523300162,"sku":"CBB07-00-4268","price":2195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/3369\/6578\/files\/CBB07-00-4268-M340i-Stainless-Exhaust.png?v=1778878171","url":"https:\/\/buypureflow.com\/products\/stainless-steel-exhaust-system-bmw-m340i-m440i","provider":"PureFlow Performance","version":"1.0","type":"link"}