{"product_id":"mad-bmw-s58-4-fat-boy-single-midpipe-m3-m4-g80-g82","title":"MAD BMW S58 4\" Fat Boy Single Midpipe M3 M4 G80 G82","description":"\u003cp\u003e\u003cb\u003eIn Stock:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eShips in 1-2 business days\u003cbr\u003e\u003cb\u003eAvailable to Order:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eShips in 3-4 Weeks\u003c\/p\u003e\n\u003cp data-start=\"92\" data-end=\"155\"\u003e\u003cstrong\u003eLooking to unlock the full potential of your G8X exhaust setup?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"157\" data-end=\"280\"\u003eThe factory mid pipe is smaller and holds back the true character of the S58 — especially once you start adding power.\u003c\/p\u003e\n\u003cp data-start=\"282\" data-end=\"415\"\u003eThe MAD 4” FATBOY Midpipe eliminates that restriction with an oversized, free-flowing design built for maximum performance and sound.\u003c\/p\u003e\n\u003cp data-start=\"417\" data-end=\"513\"\u003eThis isn’t just an upgrade — it’s a complete transformation of how your car breathes and sounds.\u003c\/p\u003e\n\u003cp data-start=\"515\" data-end=\"548\"\u003eDeep.\u003cbr data-start=\"520\" data-end=\"523\"\u003eAggressive.\u003cbr data-start=\"534\" data-end=\"537\"\u003eUnfiltered.\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eWhy this Midpipe\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"801\" data-end=\"856\"\u003eThe 4” FATBOY design is all about one thing — flow.\u003c\/p\u003e\n\u003cp data-start=\"858\" data-end=\"1031\"\u003eWith a full-length 4” center section and a minimum 3” diameter throughout, this midpipe removes the bottlenecks found in the OEM system and even smaller aftermarket options.\u003c\/p\u003e\n\u003cp data-start=\"1033\" data-end=\"1044\"\u003eThe result:\u003c\/p\u003e\n\u003cul data-start=\"1046\" data-end=\"1255\"\u003e\n\u003cli data-section-id=\"iuntpz\" data-start=\"1046\" data-end=\"1072\"\u003eNoticeably deeper tone\u003c\/li\u003e\n\u003cli data-section-id=\"15domr\" data-start=\"1073\" data-end=\"1119\"\u003eIncreased volume without the “tinny” sound\u003c\/li\u003e\n\u003cli data-section-id=\"1sqq964\" data-start=\"1120\" data-end=\"1171\"\u003eReduced rasp compared to typical non-res setups\u003c\/li\u003e\n\u003cli data-section-id=\"1dlrt5u\" data-start=\"1172\" data-end=\"1255\"\u003eA more raw, aggressive exhaust note that actually matches the car’s performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1257\" data-end=\"1384\"\u003eEven when paired with catless downpipes, this setup holds its composure while still delivering that raw, unfiltered experience.\u003c\/p\u003e\n\u003cp data-start=\"1386\" data-end=\"1483\"\u003eIf you’re tired of muted or overly refined setups, this is the one that finally wakes the car up.\u003c\/p\u003e\n\u003cp data-start=\"1485\" data-end=\"1535\"\u003eMaximum flow.\u003cbr data-start=\"1498\" data-end=\"1501\"\u003eMaximum presence.\u003cbr data-start=\"1518\" data-end=\"1521\"\u003eNo compromise.\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eInstallation Overview\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003e• Uses OEM cut location for straightforward installation\u003c\/span\u003e\u003cbr data-start=\"1623\" data-end=\"1626\"\u003e\u003cspan\u003e• Clamp-on design allows for reversibility\u003c\/span\u003e\u003cbr data-start=\"1668\" data-end=\"1671\"\u003e\u003cspan\u003e• Includes reducer couplers for multiple axle-back setups\u003c\/span\u003e\u003cbr data-start=\"1728\" data-end=\"1731\"\u003e\u003cspan\u003e• Professional installation recommended\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eFitment\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBMW G8X Platform:\u003c\/p\u003e\n\u003cp\u003e• G80 M3\u003cbr\u003e• G81 M3 Touring\u003cbr\u003e• G82 M4\u003cbr\u003e• G83 M4 Convertible\u003c\/p\u003e\n\u003cp\u003eCompatible with factory rear exhaust and most aftermarket axle-back systems.\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eConstruction\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003e• Full-Length 4” Single Midpipe Design\u003c\/span\u003e\u003cbr data-start=\"2011\" data-end=\"2014\"\u003e\u003cspan\u003e• Minimum 3” Diameter Throughout\u003c\/span\u003e\u003cbr data-start=\"2046\" data-end=\"2049\"\u003e\u003cspan\u003e• 304 Stainless Steel Construction\u003c\/span\u003e\u003cbr data-start=\"2083\" data-end=\"2086\"\u003e\u003cspan\u003e• Mandrel Bent for Maximum Flow\u003c\/span\u003e\u003cbr data-start=\"2117\" data-end=\"2120\"\u003e\u003cspan\u003e• OEM-Style Clamp Design for Easy Install\u003c\/span\u003e\u003cbr data-start=\"2161\" data-end=\"2164\"\u003e\u003cspan\u003e• Includes 3” and 2.75” Reducer Couplers\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eWhat's Included\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003e• MAD 4” FATBOY Midpipe\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• \u003c\/span\u003eBrace\u003cbr data-start=\"2255\" data-end=\"2258\"\u003e\u003cspan\u003e• Reducer Couplers (3” and 2.75”)\u003c\/span\u003e\u003cbr data-start=\"2291\" data-end=\"2294\"\u003e\u003cspan\u003e• Clamps and Required Hardware\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Eligible for a 90-day return window if unused, uninstalled, and in original condition\u003cbr data-end=\"1948\" data-start=\"1945\"\u003e• Backed by a lifetime warranty on defects and fitment\u003c\/p\u003e\n\u003cp data-end=\"2011\" data-start=\"2010\"\u003e⸻\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eAutomaz Approved\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2528\" data-end=\"2600\"\u003eNot all “loud” setups sound good — and that’s where this one stands out.\u003c\/p\u003e\n\u003cp data-start=\"2602\" data-end=\"2773\"\u003eThe FATBOY Midpipe delivers the kind of deep, aggressive tone most setups fail to achieve, while maintaining a clean, controlled sound profile even at higher power levels.\u003c\/p\u003e\n\u003cp data-start=\"2775\" data-end=\"2846\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIf you want maximum flow and a raw, dominant exhaust note — this is it.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"100%\" height=\"260\" src=\"https:\/\/www.youtube.com\/embed\/fBx-e4oP4aM\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Automaz Collective","offers":[{"title":"Default Title","offer_id":43459558572091,"sku":null,"price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/5388\/1403\/files\/IMG_5511.jpg?v=1777305557","url":"https:\/\/automazcollective.com\/products\/mad-bmw-s58-4-fat-boy-single-midpipe-m3-m4-g80-g82","provider":"Automaz Collective","version":"1.0","type":"link"}