{"type":"firestarter.listing","listing":{"id":"lst_juM0eXKc","product_name":"H&R 2.50in I.D. Race Spring 6 Free Length/1100 Rate/2.95in/3352lbs","category":"Suspension > Springs","description":"Image for representation purposes only. Actual product may vary.\n\nH&R 2.50\" I.D. Race Springs are made with extremely high tensile strength wire alloy which allows the use of a thinner wire. Manufactured using advanced materials and precision technology in Germany, H&R 2.50\" I.D. Race Springs are crafted from special lightweight (hf) 54SiCr6\"spring steel. For any given spring rate, they are on average 15% lighter and have 10% more travel than competitors' springs. Main springs range from 6\" to 18\" in length and are available in a wide selection of spring rates. TENDER SPRINGS: H&R 2.50\" I.D. Tender Springs are made of trapezoidal (flat rather than round) spring wire and have a low block height for maximum travel. These springs are designed for demanding motorsport environments, and like all H&R'springs, have been pre-blocked at the factory so they will never set or sag. The H&R 6\"mm I.D. Race Spring line is crafted from special lightweight (hf) 54SiCr6\"spring steel and is the most comprehensive 6\"mm I.D. Race Program in the U.S. If you own a Porsche GT3 or another Euro spec car, our range of 6\"mm I.D. Race Springs has you covered. With hundreds of main springs and tender springs available, H&R has the lengths and rates necessary for optimal tuning and setup. The H&R complete line of 6\"mm I.D. main springs range from 80mm to 300mm (25.4mm = 1 inch) in length and 25 N to 700 N (N/mm x 5.709 = pounds/inch) spring rates.","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/files/250idrace_315f246a-e893-4369-ac0a-04f06d22f1c6.png?v=1783980967"],"price":25400,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-14T01:31:32.929Z"},"share_url":"https://firestarter.network/l/lst_juM0eXKc","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_juM0eXKc' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy H&R 2.50in I.D. Race Spring 6 Free Length/1100 Rate/2.95in/3352lbs' and a budget_max comfortably above $25400.00 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."]}}