{"type":"firestarter.listing","listing":{"id":"lst_l-7a8t8R","product_name":"IE Catback Exhaust System For Audi B8 S4","category":"Catback Exhaust","description":"Details\n\nCoaxing a more raw, yet refined sound from any V6 can be tough, so the Audi B8 S4 3.0T took some extra “voice coaching” from iE's engineers. The iE Catback Exhaust delivers a primal scream while kicking the exhaust drone and. unwanted V6 to the curb with their proprietary DroneTrap technology. For bonus-style points and engineering might, the B8 S4 catback includes 90mm quad exhaust tips, dual 2.5\" tubing for high-flow design, and an integrated X-pipe for greater exhaust flow and superior sound.\nLEADING FEATURES\n\n\nSay it loudly -Aggressive, yet refined exhaust note\n\nDroneTrap Technology -Proprietary no-drone resonator\n\n90mm quad exhaust tips -Motorsport look\n\nDual 2.5” tubing -High flow design\n\nIntegrated X-pipe -Superior sound\n\nEasy Install -No cutting, no welding, no hassle\n\nBolt-on fit -Includes hardware for stock or iE midpipes\n\n\nOVERSIZED SLASH-CUT TIPS\nThe quad oversized 90mm exhaust tips will make your B8 S4 look fast, even when it’s standing still. These slash-cut tips feature a motorsport-inspired brushed finish with adjustable depth for dialing your aggressive looks up or down.\n\niE DRONETRAP TECHNOLOGY\nDroneTrap is iE's proprietary technology that takes away the buzz-killing drone, leaving only the sweet song of your people. It captures the pulse waves that make up the engine's exhaust note, draws them into an internal port, resonates them against each other, and cancels annoying drone waves. Only the good stuff remains—a full, rich, audacious call of the wild.\nQUALITY IS IN THE DETAILS\nIt’s not just the sound that the iE Catback delivers. They always bring their A-game to serve up exceptional designs made from built-to-last materials for installs that fit like a glove. iE's Catback Exhaust is made from corrosion-resistant, mandrel-bent T304L stainless steel with strong, multi-point, boxed exhaust hangers for long life and reinforced and bridged straight sections to prevent rattles. Install kit includes all hardware and leak-free, OE-quality exhau","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_01_720x_b0ba2a33-20a5-48e0-937c-6ee93045e0b9.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_02_720x_bc9b1504-8a1c-4ffd-a8f5-7530073f6941.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_03_720x_c9fe5743-56f6-4350-80b3-e754e386eb3c.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_04_720x_fbe94e33-80bc-4f48-aa09-36cd1df87ecf.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_05_720x_91988a13-6dfe-4d33-9bf6-162c81f832a5.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_06_720x_0c4519e1-26dc-420c-8436-e3d380c27918.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_07_720x_77bee282-3a92-47ea-abd8-3cad2a4c8a8a.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_08_720x_e20a830d-f2d4-4cdf-8d48-e761c1948383.webp?v=1745245900","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IEEXCG3_09_720x_648a6ed2-4024-4067-be44-3b9c7fe09da8.webp?v=1745245900"],"price":2089.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:28.653Z"},"share_url":"https://firestarter.network/l/lst_l-7a8t8R","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 <your Firestarter API key>","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_l-7a8t8R' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy IE Catback Exhaust System For Audi B8 S4' and a budget_max comfortably above $2089.99 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."]}}