{"type":"firestarter.listing","listing":{"id":"lst_OBQTU1FB","product_name":"Valvetronic Designs Audi RS6 / RS7 C8 Valved Sport Exhaust System","category":"Cat Backs","description":"\nAudi C8 RS6 Avant & RS7 Sportback Valved Cat-Back Exhaust System\nFull Titanium System with Electronic Valve Control & Integrated H-Pipe\n\nOverview\nThe C8 RS6/RS7 pairs long-distance comfort with serious pace—but the factory exhaust keeps the 4.0L twin-turbo V8 far too quiet. The Valvetronic Designs Titanium Valved Cat-Back transforms the experience, delivering a raw, motorsport-inspired soundtrack with the valves open, and a refined, grand-touring tone with the valves closed.\nCrafted entirely from titanium and engineered around a large cross-section H-pipe, this system improves exhaust scavenging and throttle response while staying drone-free in either mode. For maximum presence and performance, pair it with our free-flow front bypass pipes.\n\nNote: Valve simulators are recommended on this platform to prevent CELs related to factory valve monitoring. Contact our support team for guidance.\n\n\n\nWhy It Works\n\n\nTitanium Construction: Significant weight reduction and rapid heat dissipation for sharper response.\n\n\nLarge Cross-Section X-Pipe: Enhances scavenging for a cleaner, more exotic tone.\n\n\nFull-System Tuning: Designed as a cohesive cat-back for consistent sound quality and fitment.\n\n\n\nSound & Control\n\n\nValves Open: Full-bodied V8 aggression, pronounced midrange, and a sharper top-end note.\n\n\nValves Closed: Subtle, composed tone ideal for daily use and highway cruising.\n\n\nBypass Pipes (Optional): Unlock maximum volume and presence when combined with the cat-back.\n\n\n \n\n\nConstruction & Options\n\n\nMaterial: Lightweight titanium throughout.\n\n\nWeight Savings: 61.5 lb lighter than the factory exhaust.\n\n\nCraftsmanship: Precision TIG welds and smooth, high-flow routing for durability and performance.\n\n\nTips: Premium tips designed to complement the RS6/RS7 rear aesthetics.\n\n\n\nFitment\n\n\n2019–2026 Audi RS6 Avant (C8)\n\n\n2019–2026 Audi RS7 Sportback (C8)\n\n\n \n\n\nInstallation Notes\n\n\nDirect bolt-on cat-back replacement.\n\n\nValve simulators recommended to avoid valve-rela","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403034-2.webp?v=1781118944","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403029-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403030-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403035-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403036-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403037-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403038-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403039-2.webp?v=1781118944","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403041-2.webp?v=1781118943","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/A7403043-2.webp?v=1781118943"],"price":4999.99,"currency":"USD","in_stock":true,"inventory_qty":29997,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:20.052Z"},"share_url":"https://firestarter.network/l/lst_OBQTU1FB","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_OBQTU1FB' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Valvetronic Designs Audi RS6 / RS7 C8 Valved Sport Exhaust System' and a budget_max comfortably above $4999.99 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."]}}