{"product_id":"milltek-resonated-secondary-cat-bypass-for-bmw-g8x-m3-m4-ssxbm1269-ssxbm1269","title":"Milltek Resonated Secondary Cat Bypass for BMW G8X M3 M4 (SSXBM1269)","description":"\u003cp\u003eMilltek Axle Back Resonated Secondary Cat Bypass for BMW G8X M3 and M4. Direct fitment to OE downpipes and OE axle-back systems. Hand-finished T304L stainless steel construction with 3.00\" (76.20mm) mandrel-bent piping engineered to optimize exhaust flow while preserving factory integration points.\u003c\/p\u003e\n\u003cp\u003e This resonated design eliminates secondary catalyst restriction while maintaining acoustic balance through OE resonance point engineering. Uses factory hangers and mounting locations—no modification required. T304L material resists thermal cycling corrosion common in secondary cat applications. \u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMW M3 G80 (2021+) and BMW M4 G82\/G83 (2021+)\u003c\/li\u003e\n\u003cli\u003eFits OE downpipes only\u003c\/li\u003e\n\u003cli\u003eFits OE axle-back systems only\u003c\/li\u003e\n\u003cli\u003eDirect factory fitment—no welding, cutting, or modification\u003c\/li\u003e\n\u003cli\u003eOEM hanger and sensor compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Milltek secondary cat bypasses are engineered alternatives to full cat-back systems for buyers seeking midpipe performance gains without replacing the entire system. \u003c\/p\u003e\n\u003cp\u003eFits OE system.\u003c\/p\u003e\n\u003cp\u003eDesigned and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.\u003c\/p\u003e\n\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul class=\"fitment-list\"\u003e\n\u003cli\u003e2021-2026 BMW M3 Competition\u003c\/li\u003e\n\u003cli\u003e2021-2026 BMW M4 Competition\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":60150746349854,"sku":"MILSSXBM1269","price":1466.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXBM1269_1.jpg?v=1791255323","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-resonated-secondary-cat-bypass-for-bmw-g8x-m3-m4-ssxbm1269-ssxbm1269","provider":"Signature Autohaus","version":"1.0","type":"link"}