{"product_id":"mad-bmw-m3-m4-s58-g80-g82-axle-back-titanium","title":"MAD BMW M3 M4 S58 G80 G82 Axle Back Titanium","description":"\u003cp\u003eThe MAD Titanium Axle Back gives your G80\/G82 two cars in one: a refined, near-stock cruiser with the valves shut, and a hard-charging, burbling monster with them open. It runs off your factory valve control, so the whole personality of the car changes from the steering-wheel buttons.\u003c\/p\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eValves closed:\u003c\/strong\u003e airflow routes through the muffler for a clean, quiet tone that's just a shade louder than factory — perfect for early mornings and long highway pulls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValves open:\u003c\/strong\u003e most of the flow bypasses the muffler for a loud, aggressive note with proper burbles, all without any droning resonance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways clean:\u003c\/strong\u003e even wide open, a portion of the airflow still passes through the muffler, so you get aggression without rasp — especially up high in the rev range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuild \u0026amp; finishes\u003c\/h3\u003e\n\u003cp\u003eTitanium construction sheds significant weight over the OEM axle back, sharpening response and handling. Choose your tip finish to match the build: Brushed, Black, Carbon, or Burnt Titanium.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW M3 (G80) \u0026amp; M4 (G82) with the S58 engine.\u003c\/p\u003e\n\u003cp\u003eFrom KORE SPEED — Canadian-owned and enthusiast-run. Email \u003ca href=\"mailto:support@korespeed.com\"\u003esupport@korespeed.com\u003c\/a\u003e with any fitment questions.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":51574531817528,"sku":null,"price":1859.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/39_source_1716997179__41093__32493.1755812335.386.513.jpg?v=1764906609","url":"https:\/\/korespeed.com\/products\/mad-bmw-m3-m4-s58-g80-g82-axle-back-titanium","provider":"KORE SPEED","version":"1.0","type":"link"}