{"type":"firestarter.listing","listing":{"id":"lst_WiCnpfjD","product_name":"BMW G80/G82/G83/G87 M2 / M3 / M4 400 Cell Catted Downpipes","category":"Motor Vehicle Exhaust","description":"BMW G8X M2 / M3 / M4 – EPA-Compliant 400 Cell Catted Downpipes\nEngineered for the S58 Twin-Turbo Inline-6 • High-Flow • Compliant • \n\nIntroducing Our NEW 400 Cell EPA-Compliant Downpipes for the G8X Platform\nThe 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 NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce exhaust backpressure, enhance turbo efficiency, and unlock a sharper, more aggressive exhaust character — all while maintaining emissions compliance standards.\nThis upgrade maximizes the performance potential of the S58 platform without compromising drivability.\n\nWhy Upgrade to 400 Cell?\n\n\nEPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust flow while maintaining compliance standards.\n\nImproved Turbo Response: Reduced restriction enhances spool speed and mid-range power delivery.\n\nEnhanced Exhaust Character: Deeper tone with more defined turbo acoustics and sharper high-RPM presence.\n\nStreet & Track Ready: Noticeable gains while maintaining everyday usability.\n\n\nPerformance & Engineering\n\n\nOptimized Flow Architecture: Minimizes backpressure while preserving catalyst efficiency.\n\nMandrel-Bent Tubing: Smooth internal transitions for consistent exhaust velocity.\n\nPrecision TIG Welding: Built to withstand extreme exhaust temperatures and high boost levels.\n\nDirect OEM Bolt-On Installation: Utilizes factory mounting locations for straightforward installation.\nEngineered to Pair Seamlessly with Valvetronic Exhaust Systems\n\n\nSound Transformation\n\n\nStock Exhaust + Downpipes: Noticeable increase in depth and turbo presence with improved exhaust clarity.\n\nValvetronic Exhaust + Downpipes: Maximum transformation — stronger crackles, enhanced turbo spool acoustics, and a more aggressive overall signature.\n\n\nConstruction & Durability\n\nPremium high-grade stainless steel construct","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08397_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08399_ShopifyCustomSize.jpg?v=1784213529","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08443_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08402_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08424_ShopifyCustomSize.jpg?v=1784213529","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08411_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08446_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08413_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08453_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08418_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08435_ShopifyCustomSize.jpg?v=1784213528","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/DSC08438_ShopifyCustomSize.jpg?v=1784213529"],"price":2249.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-16T16:00:45.320Z"},"share_url":"https://firestarter.network/l/lst_WiCnpfjD","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer ","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_WiCnpfjD' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy BMW G80/G82/G83/G87 M2 / M3 / M4 400 Cell Catted Downpipes' and a budget_max comfortably above $2249.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}