{"type":"firestarter.listing","listing":{"id":"lst_D3MZEqrJ","product_name":"IE 2.5L 5 Cylinder MK5/MK6/TTRS Valve Spring Kit, O7K/07L","category":null,"description":"\nTHE BEST VALVE SPRING AND RETAINER KIT\nThis high-quality IE valve spring and titanium retainer kit features spring rates optimized to match your vehicle specifications and provide proper valve control preventing valve float in high-power and high-revving applications.\nINCLUDED IN KIT\n\n20 Precision Wound Intake & Exhaust Valve Springs\n10 Exact Tolerance Titanium Intake Retainers\n10 Exact Tolerance Titanium Exhaust Retainers\n\n\nTECHNICAL DETAILS\nIncreasing your engines power output often comes with modifications that require more RPMs to get the most out of it, such as larger turbochargers, tuned intake manifolds , nd high-output software tunes. Upgrading those components without changing out the valve springs can leave you with a short power band or cause valve float and other significant damage.Other cheap valve spring kits are often designed by simply finding a spring that is stiffer and will fit. Those are also not usually a good compromise because many times they are the wrong stiffness, and often poorly constructed. A broken valve spring can cause total engine failure and destroy everything that you have put hard work and money into. Our kits are the only spring and retainer kits on the market designed by someone with a working knowledge of the unique valvetrain in the VW 07K 5 cylinder engines, and what the spring requirements actually are.Manufactured out of the best spring wire in the world IE valve springs use a patented multi stage shot peening process that further reduces failure rates. Our titanium retainers are machined with an excellent surface finish and tight tolerance control for a long lifespan. Each application is thoroughly tested to perform on these engines right here in our test facility in Salt Lake City, Utah. Our spring and retainer kits are the best matched, most tested parts on the market. Purchasing a set will ensure that your engine runs at maximum performance and reliability.\nVEHICLE FITMENT\n\nVW - Golf 2010-2014 (MK6) 2.5L engines\nVW","images":["https://cdn.shopify.com/s/files/1/0024/4898/2060/products/integrated_engineering_spring_kit_vw_25_20v_5_cylinder_1_1_3.1505874368_720x_e7cda694-3c00-4a94-a389-85cdd05ca5f2.jpg?v=1567718292","https://cdn.shopify.com/s/files/1/0024/4898/2060/products/integrated_engineering_spring_kit_vw_25_20v_5_cylinder_4_1_2.1505874368_720x_0109bc22-6470-4cf6-9f70-0c34218878d3.jpg?v=1568308221","https://cdn.shopify.com/s/files/1/0024/4898/2060/products/integrated_engineering_spring_kit_vw_25_20v_5_cylinder_3_1_2.1505874368_720x_b3cb2428-ffb4-4932-957c-33f5df749d9e.jpg?v=1568308221"],"price":827.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:23.769Z"},"share_url":"https://firestarter.network/l/lst_D3MZEqrJ","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_D3MZEqrJ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy IE 2.5L 5 Cylinder MK5/MK6/TTRS Valve Spring Kit, O7K/07L' and a budget_max comfortably above $827.99 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."]}}