{"product_id":"mad-bmw-b58-2025-gen-3-m340-m440-fat-boy-5-0-downpipe-catless","title":"MAD BMW B58 2025+ Gen 3 M340 M440 Fat Boy 5.0\" Downpipe Catless","description":"\u003cp\u003eUnleash the full potential of your 2025+ B58 Gen 3 with the MAD Fat Boy 5.0\" Catless Downpipe. Crafted from premium 304 stainless steel, the larger 5.0-inch diameter delivers superior airflow for more horsepower, quicker turbo response and noticeable torque gains.\u003c\/p\u003e\n\u003cp\u003eThe expanded diameter sets it apart from standard catless downpipes with a deeper, richer and significantly more aggressive exhaust tone. Precision welds and exceptional craftsmanship ensure perfect, durable bolt-on fitment.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eExpanded 5.0\" diameter for maximum airflow.\u003c\/li\u003e\n\u003cli\u003eDeeper, richer, more aggressive tone with more power than standard catless designs.\u003c\/li\u003e\n\u003cli\u003ePrecision craftsmanship and perfect bolt-on fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2025+ BMW M340 \u0026amp; M440\u003c\/li\u003e\n\u003cli\u003e2025+ BMW X3 G45 M50\u003c\/li\u003e\n\u003cli\u003e2025+ BMW X4 G46 M50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEmissions disclaimer:\u003c\/strong\u003e This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws. Please check your local laws before purchase and installation.\u003c\/p\u003e\n\u003cp\u003eShips from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email \u003ca href=\"mailto:support@korespeed.com\"\u003esupport@korespeed.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":51574530048056,"sku":"MAD-127","price":279.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/WhatsApp_Image_2025-05-16_at_11.07.45_8f3645ef__37688.1749140230.386.513.jpg?v=1764906216","url":"https:\/\/korespeed.com\/products\/mad-bmw-b58-2025-gen-3-m340-m440-fat-boy-5-0-downpipe-catless","provider":"KORE SPEED","version":"1.0","type":"link"}