{"product_id":"mad-s58-valved-axle-back-exhaust-bmw-g80-m3-g81-m3-touring-g82-g83-m4","title":"MAD S58 Valved Axle Back Exhaust BMW G80 M3 \/ G81 M3 Touring \/ G82 G83 M4","description":"\u003cp data-start=\"484\" data-end=\"509\"\u003eThe S58 makes real power.\u003c\/p\u003e\n\u003cp data-start=\"511\" data-end=\"564\"\u003eThe stock exhaust sounds like it’s asking permission.\u003c\/p\u003e\n\u003cp data-start=\"566\" data-end=\"582\"\u003eThis fixes that.\u003c\/p\u003e\n\u003cp data-start=\"584\" data-end=\"797\"\u003eThe MAD valved axle back gives the car the volume and edge BMW should’ve delivered from day one. It keeps factory valve control, retains OEM integration, and actually lets the engine sound like it means something.\u003c\/p\u003e\n\u003cp data-start=\"799\" data-end=\"804\"\u003eSound\u003c\/p\u003e\n\u003cp data-start=\"806\" data-end=\"887\"\u003eValves closed, it’s deeper and more assertive than stock without being obnoxious.\u003c\/p\u003e\n\u003cp data-start=\"889\" data-end=\"994\"\u003eValves open, it’s aggressive, sharp, and properly loud. Not fake loud. Not artificial. Real exhaust tone.\u003c\/p\u003e\n\u003cp data-start=\"996\" data-end=\"1140\"\u003eYou keep full control through your factory drive modes. No extra modules. No weird workarounds. It behaves exactly like OEM, just with backbone.\u003c\/p\u003e\n\u003cp data-start=\"1142\" data-end=\"1160\"\u003eFlow \u0026amp; Performance\u003c\/p\u003e\n\u003cp data-start=\"1162\" data-end=\"1262\"\u003eTubing increases to 76mm over the factory 70mm. Less restriction, cleaner exit, better overall flow.\u003c\/p\u003e\n\u003cp data-start=\"1264\" data-end=\"1402\"\u003eThis is not a dyno queen mod. Expect modest gains in the +5 hp and +5 lb-ft range. What you will notice immediately is response and sound.\u003c\/p\u003e\n\u003cp data-start=\"1404\" data-end=\"1444\"\u003eThe car feels less muted. Because it is.\u003c\/p\u003e\n\u003cp data-start=\"1446\" data-end=\"1458\"\u003eConstruction\u003c\/p\u003e\n\u003cp data-start=\"1460\" data-end=\"1567\"\u003e• 100% T304 stainless steel\u003cbr data-start=\"1487\" data-end=\"1490\"\u003e• Fully TIG welded\u003cbr data-start=\"1508\" data-end=\"1511\"\u003e• Brush finish\u003cbr data-start=\"1525\" data-end=\"1528\"\u003e• Roughly 7 pounds lighter than stock\u003c\/p\u003e\n\u003cp data-start=\"1569\" data-end=\"1634\"\u003eFactory axle back sits around 44 pounds. This comes in around 37.\u003c\/p\u003e\n\u003cp data-start=\"1636\" data-end=\"1641\"\u003eTips:\u003c\/p\u003e\n\u003cp data-start=\"1643\" data-end=\"1689\"\u003e• 4-inch silver\u003cbr data-start=\"1658\" data-end=\"1661\"\u003e• 4.5-inch black or carbon\u003c\/p\u003e\n\u003cp data-start=\"1691\" data-end=\"1769\"\u003eThey sit correctly in the factory cutouts. No awkward overhang. No cheap look.\u003c\/p\u003e\n\u003cp data-start=\"1771\" data-end=\"1793\"\u003eFitment \u0026amp; Installation\u003c\/p\u003e\n\u003cp data-start=\"1795\" data-end=\"1969\"\u003e• Connects to factory midpipe, cutting required\u003cbr data-start=\"1842\" data-end=\"1845\"\u003e• Direct fit with MAD midpipes, no cutting required\u003cbr data-start=\"1896\" data-end=\"1899\"\u003e• Extended valve harness included\u003cbr data-start=\"1932\" data-end=\"1935\"\u003e• All mounting hardware included\u003c\/p\u003e\n\u003cp data-start=\"1971\" data-end=\"1990\"\u003eNow Let’s Be Honest\u003c\/p\u003e\n\u003cp data-start=\"1992\" data-end=\"2062\"\u003eAn axle back by itself is completely manageable on a daily driven car.\u003c\/p\u003e\n\u003cp data-start=\"2064\" data-end=\"2113\"\u003eA resonated midpipe by itself is also manageable.\u003c\/p\u003e\n\u003cp data-start=\"2115\" data-end=\"2201\"\u003eStack both together and things get loud quickly, especially with downpipes in the mix.\u003c\/p\u003e\n\u003cp data-start=\"2203\" data-end=\"2362\"\u003eIf this car sees real everyday use, think about your full exhaust stack before going all in. If it’s a weekend toy and you want maximum presence, then send it.\u003c\/p\u003e\n\u003cp data-start=\"2364\" data-end=\"2442\"\u003eWe’ll help you choose the right combination instead of just selling you parts.\u003c\/p\u003e\n\u003cp data-start=\"2444\" data-end=\"2491\"\u003eThis belongs in a proper Weekend Warrior build.\u003c\/p\u003e\n\u003cp data-start=\"2493\" data-end=\"2570\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eSound is part of the experience.\u003cbr data-start=\"2525\" data-end=\"2528\"\u003eJust make sure you build it intentionally.\u003c\/p\u003e","brand":"MAD-US","offers":[{"title":"Brushed 4\"","offer_id":42585701843042,"sku":"MAD-069-Brushed","price":1196.1,"currency_code":"USD","in_stock":true},{"title":"Black 4.5\"","offer_id":42585701875810,"sku":"MAD-069-Black","price":1304.1,"currency_code":"USD","in_stock":true},{"title":"Carbon Fiber 4.5\"","offer_id":42585701908578,"sku":"MAD-069-Carbon","price":1304.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/4395\/7090\/files\/MAD_exhaust_wide-__62685.jpg?v=1771882717","url":"https:\/\/ortmotorsport.com\/products\/mad-s58-valved-axle-back-exhaust-bmw-g80-m3-g81-m3-touring-g82-g83-m4","provider":"ORT Motorsport","version":"1.0","type":"link"}