{"product_id":"mad-x3-x4-m40-catback-exhaust-b58-g01-g02","title":"MAD X3 X4 M40 Catback Exhaust B58 G01 G02","description":"\u003cp\u003eThe MAD Catback transforms the B58-powered X3 M40i and X4 M40i from a quiet daily into a genuinely exciting drive. It's engineered around one goal: the deepest, cleanest tone possible — rasp-free, drone-free and rattle-free — backed by freer flow and a sharper throttle.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep midrange tone\u003c\/strong\u003e that adds real character without shouting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRasp-free across the rev range\u003c\/strong\u003e for a crisp, clean note.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero drone\u003c\/strong\u003e at cruise and \u003cstrong\u003ezero rattle\u003c\/strong\u003e thanks to quality materials and tight construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Y-midpipe\u003c\/strong\u003e and a \u003cstrong\u003ecentral exhaust layout\u003c\/strong\u003e that optimise flow and acoustics for the cleanest possible sound.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-valve system:\u003c\/strong\u003e replaces the factory single valve so you can run a subtle daily tone (valves closed) or an aggressive bark (valves open).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent 70mm piping\u003c\/strong\u003e throughout for an even, balanced output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e89mm tips\u003c\/strong\u003e in Brushed Stainless, Matte Black, or Carbon Fiber.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuild \u0026amp; install\u003c\/h3\u003e\n\u003cp\u003eMade from premium 304 stainless steel. It's a direct bolt-on replacement using factory mounting points — no cutting or welding — and ships with all the clamps, bolts and gaskets you need.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW X3 M40i (G01) \u0026amp; X4 M40i (G02), B58 turbocharged inline-six.\u003c\/p\u003e\n\u003cp\u003eShipped fast by KORE SPEED — Canadian-owned. Questions? \u003ca href=\"mailto:support@korespeed.com\"\u003esupport@korespeed.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":51574533652536,"sku":null,"price":1699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/WhatsApp_Image_2024-09-29_at_09.03.01_1bc2de34__41632.1727626554.386.513.jpg?v=1764906942","url":"https:\/\/korespeed.com\/products\/mad-x3-x4-m40-catback-exhaust-b58-g01-g02","provider":"KORE SPEED","version":"1.0","type":"link"}