{"product_id":"milltek-large-bore-downpipe-hi-flow-sports-cat-bmw-428i-f32-ssxbm977","title":"Large Bore Downpipe Hi-Flow Sports Cat | BMW 428i F32 | Milltek","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMilltek Large Bore Downpipe with integrated Hi-Flow Sports Catalyst for BMW 428i (F32). Direct factory fitment when paired with Milltek Cat-Back Exhaust System. Mandrel-bent T304L stainless steel construction with CNC-formed catalyst housing delivers increased flow over OEM restrictive units.\u003c\/p\u003e\n\u003cp\u003eLarger diameter core expands exhaust gas velocity and reduces backpressure, unlocking additional power and torque. Hi-Flow catalyst maintains street-legal emissions compliance while allowing full acoustic character expression. Stage 2 ECU remap required to extract peak performance and recalibrate fuel delivery.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 428i F32 (2014-2016)\u003c\/li\u003e\n\u003cli\u003eRequires Milltek Cat-Back System for complete fitment\u003c\/li\u003e\n\u003cli\u003eUses OEM exhaust hangers — no modification required\u003c\/li\u003e\n\u003cli\u003eStage 2 tune mandatory\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Hand-finished welds and TIG construction throughout. This downpipe unlocks the full potential of your F32 when combined with proper engine management. \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\u003ch2\u003eFitment\u003c\/h2\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":68005526700334,"sku":"SSXBM977","price":1249.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/1719\/1726\/files\/SSXBM977_1.jpg?v=1794451710","url":"https:\/\/shopicwp.com\/products\/milltek-large-bore-downpipe-hi-flow-sports-cat-bmw-428i-f32-ssxbm977","provider":"Inner Circle Wheels and Performance","version":"1.0","type":"link"}