{"product_id":"bmw-g80-g82-g83-g87-m2-m3-m4-400-cell-catted-downpipes-valvetronic-designs","title":"BMW G80\/G82\/G83\/G87 M2 \/ M3 \/ M4 400 Cell Catted Downpipes - Valvetronic Designs","description":"\u003ch1\u003e\u003cstrong\u003eBMW G8X M2 \/ M3 \/ M4 – EPA-Compliant 400 Cell Catted Downpipes\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch3\u003eEngineered for the S58 Twin-Turbo Inline-6 • High-Flow • Compliant • \u003c\/h3\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eIntroducing Our NEW 400 Cell EPA-Compliant Downpipes for the G8X Platform\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe BMW G8X M2, M3 and M4 represent the next evolution of M performance, powered by the highly capable S58 twin-turbo inline-6. While factory catalysts prioritize restriction and sound suppression, our \u003cstrong\u003eNEW EPA-compliant 400 cell high-flow catted downpipes\u003c\/strong\u003e are engineered to reduce exhaust backpressure, enhance turbo efficiency, and unlock a sharper, more aggressive exhaust character — all while maintaining emissions compliance standards.\u003c\/p\u003e\n\u003cp\u003eThis upgrade maximizes the performance potential of the S58 platform without compromising drivability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eWhy Upgrade to 400 Cell?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEPA-Compliant 400 Cell High-Flow Catalysts:\u003c\/strong\u003e Increased exhaust flow while maintaining compliance standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Turbo Response:\u003c\/strong\u003e Reduced restriction enhances spool speed and mid-range power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Exhaust Character:\u003c\/strong\u003e Deeper tone with more defined turbo acoustics and sharper high-RPM presence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreet \u0026amp; Track Ready:\u003c\/strong\u003e Noticeable gains while maintaining everyday usability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003ePerformance \u0026amp; Engineering\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow Architecture:\u003c\/strong\u003e Minimizes backpressure while preserving catalyst efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMandrel-Bent Tubing:\u003c\/strong\u003e Smooth internal transitions for consistent exhaust velocity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision TIG Welding:\u003c\/strong\u003e Built to withstand extreme exhaust temperatures and high boost levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Bolt-On Installation:\u003c\/strong\u003e Utilizes factory mounting locations for straightforward installation.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEngineered to Pair Seamlessly with Valvetronic Exhaust Systems\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eSound Transformation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock Exhaust + Downpipes:\u003c\/strong\u003e Noticeable increase in depth and turbo presence with improved exhaust clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValvetronic Exhaust + Downpipes:\u003c\/strong\u003e Maximum transformation — stronger crackles, enhanced turbo spool acoustics, and a more aggressive overall signature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eConstruction \u0026amp; Durability\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePremium high-grade stainless steel construction\u003c\/li\u003e\n\u003cli\u003eHigh-temperature resistant 400 cell catalyst cores\u003c\/li\u003e\n\u003cli\u003eOEM-style sensor placement for proper operation\u003c\/li\u003e\n\u003cli\u003eEngineered for long-term reliability under high boost and tuning conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eUnleash the full potential of your S58-powered G8X — starting at the source.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e📩 Questions or ordering assistance? customerservice@valvetronic.com\u003c\/p\u003e","brand":"Valvetronic Designs","offers":[{"title":"Default Title","offer_id":58157503840637,"sku":"BMW.G8X.M2.M3.M4.FF.400C.BR","price":1999.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0405\/5649\/5001\/files\/DSC08397_ShopifyCustomSize_jpg_4f8ce0b6-d959-4d32-894b-28e13f7c6609.webp?v=1778597737","url":"https:\/\/www.bafmotorsport.co.uk\/fr\/products\/bmw-g80-g82-g83-g87-m2-m3-m4-400-cell-catted-downpipes-valvetronic-designs","provider":"BAF Motorsport","version":"1.0","type":"link"}