{"type":"firestarter.listing","listing":{"id":"lst_QDZEwv7M","product_name":"APR Lowering Bumpstops - MK7/MK8 GTI/GLI/R","category":"Suspension","description":"APR Lowering Bumpstops are here! They improve handling and ride quality and are designed for use on lowered vehicles such as those with APR Roll-Control Lowering Springs.\n\nBumpstops are a critical handling and ride-quality component of your suspension system, but they are often completely overlooked. Most setups are either running the factory bumpstop, which are too tall causing constant engagement during normal driving, cut bumpstops, which remove the progressive dampening, or they've removed them all together! All of these scenarios hurt handling and make the ride harsh.\n\nAPR Bumpstops were designed using a balance of durometer (hardness) and length to tune comfort and handling under normal and aggressive driving scenarios. The balance takes the following into account:\n\nLength:\n\nA longer bumpstop, like the factory units, will have more volume to absorb a harsh impact. But during normal driving on a lowered vehicle, they will constantly contact, which impacts both handling and comfort. The quick engagement can disrupt handling and cause driver discomfort. We've shortened the bumpstop to ensure that they work on a lowered vehicle, but keep them tall enough so they have enough volume to absorb a hard hit.\n\nDurometer (hardness):\n\nAn overly soft bumpstop is comfortable, but can't absorb enough energy to protect from damage. Likewise, an overly stiff bumpstop will impact ride quality, and impact handling negatively. Testing various setups we strike a balance by increasing stiffness to provide better handling without going overly stiff as to impact comfort. The bumpstops also have a progressive rate to them with a soft \"nose.\" This allows the bumpstop to gently engage as to not disrupt handling. It's also less noticeable to the driver, aiding in the comfort of the driving experience.\n\nSpecifications:\n\nMaterial: PUR\nFront / Rear Durometer: 75A (~50A OEM) / 65A (~55A OEM)\nFront / Rear I.D.: 19mm / 17mm\nFront / Rear O.D.: 56mm / 59mm Front / Rear Length: 40mm (56mm OEM) / 8","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/sus00025_001.jpg?v=1696434199","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/sus00025_002.jpg?v=1696434199","https://cdn.shopify.com/s/files/1/0024/4898/2060/files/sus00025_003.jpg?v=1696434200"],"price":54.95,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:21.923Z"},"share_url":"https://firestarter.network/l/lst_QDZEwv7M","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_QDZEwv7M' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy APR Lowering Bumpstops - MK7/MK8 GTI/GLI/R' and a budget_max comfortably above $54.95 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."]}}