{"type":"firestarter.listing","listing":{"id":"lst_fU-U7sAy","product_name":"IE Catback Exhaust System For Audi B9/B9.5 S4","category":"Catback Exhaust","description":"Details\n\nThe IE Catback Exhaust System for your Audi B9/B9.5 S4 incorporates our in-house engineered DroneTrap technology to deliver a truly aggressive exhaust note without any annoying drone or rasp. Engineered with cutting-edge design features, including mandrel-bent stainless steel, TIG welding, multi-point reinforcements, and oversized quad tips. Experience the elevated and enriched sound an S4 deserves.\n \nFEATURES\n\nDroneTrap Technology -IE's proprietary no-drone resonator design\nBolt-on direct fit -No cutting, no welding, no hassle\nAggressive look -Large 90mm slash-cut quad tips\nHigh-flow design -Dual 2.5\" piping to support any power output\nReliable engineering -Leak free, stamped, & multi-point reinforced\n50 states legal -No check engine light & emissions compliant\n\nIE DRONETRAP TECHNOLOGY\nIE's advanced DroneTrap technology captures the pulse waves responsible for your B9 3.0T engine's exhaust note and draws them into dual mathematically tuned resonators. The internal ports are engineered to resonate these waves against each other in a process that selectively cancels out those responsible for annoying drones. The remaining waves produce the deepened and enriched exhaust acoustics you love.\n \nQUAD SLASH-CUT TIPS\nWhat is the point of a larger exhaust that looks stock? Stand out from the crowd with oversized 90mm quad slash-cut exhaust tips. These aggressive-looking tips fill the factory exhaust cutouts for that high-end sporty look.\nBOLT-IN KIT\nOur catback design includes all sections to replace the factory exhaust tips, mufflers, and resonator up to the midpipes. Enjoy an unrestricted system that delivers the perfect exhaust note from your turbocharged V6 engine.\nOPTIONAL MIDPIPES\nWant to take your catback to the next level? Add a set of IE Midpipes for an even larger boost in sound. By upgrading this section, you'll remove the two factory resonators and 12 feet of exhaust piping, further improving exhaust flow and acoustic notes. \n \nMidpipe upgrade is","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/IECatbackExhaustSystemForAudiB9S4IEEXCK5_01_720x_6f6c981b-4a20-48b3-b8de-a6abe77c6ed7.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_08_720x_074f20ee-3ee0-477c-be47-f0faf29001bb.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_02_720x_bdfc7764-9e82-429b-a834-b07946169d11.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_03_720x_626a3205-11b7-40f0-a471-68a45e498551.jpg?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_04_720x_cc141de8-390c-4c1a-b906-4e4f5ecb5da9.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_05_720x_6b3bb6d8-b582-421e-bc1e-c82265a26018.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_06_720x_7df41f50-5bba-4e17-95f7-17f6771e8a09.jpg?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_07_720x_b07cf7fb-fa1c-4b1a-bd10-bb4177dd0c25.webp?v=1745431208","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_09_720x_c7e27a65-ddbc-47dd-b86a-6d4993bcf78d.webp?v=1745431203","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/ExhaustSystemForAudiB9S4IEEXCK5_10_720x_a6673c06-747f-4559-ab14-1749c6db5f24.webp?v=1745431203"],"price":1687.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:28.684Z"},"share_url":"https://firestarter.network/l/lst_fU-U7sAy","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_fU-U7sAy' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy IE Catback Exhaust System For Audi B9/B9.5 S4' and a budget_max comfortably above $1687.99 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."]}}