{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"5f26db9c2185","name":"KIT IN VALVE+SPRING KXF250, PROX 28.SIS4336-2 INTAKE","sku":"65-K167.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":152.27,"formatted":"£152.27"},"summary":"ProX steel intake valve and spring kit. This kit offers a 3x extended lifespan compared to OEM titanium valves. It includes steel intake valves and specially designed stronger valve springs to accommodate the extra weight of steel valves. The ProX kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number: 28.SIS4336-2.","attributes":[{"label":"General Product Group","value":"Cam & Valvetrain"},{"label":"General Product Type","value":"Valve & Spring Kit"},{"label":"Variant Id","value":"264483"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K167_2EPX/fa9d794ce6c14aab.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K167_2EPX/fa9d794ce6c14aab.jpg"],"description":"ProX steel intake valve and spring kit. This kit offers a 3x extended lifespan compared to OEM titanium valves. It includes steel intake valves and specially designed stronger valve springs to accommodate the extra weight of steel valves. The ProX kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number: 28.SIS4336-2.","descriptionMarkdown":"### ProX Steel Intake Valve and Spring Kit\n\nUpgrade your engine's performance and durability with the ProX Steel Intake Valve and Spring Kit. This high-quality kit is designed to replace your OEM titanium valves and springs, offering a significant increase in lifespan.\n\nProX offers a comprehensive range of titanium to steel conversion kits. This particular kit features a steel intake valve and specially designed, stronger valve springs. The increased weight of the steel valve necessitates a heavier spring to ensure optimal performance and prevent valve float.\n\nThis kit is engineered for a direct replacement of OEM valves and springs, allowing you to utilize your existing OEM retainers, bases, and valve seats for a straightforward installation.\n\n#### Key Features:\n\n \n- Material: Durable steel construction for extended lifespan.\n \n- Increased Durability: ProX steel valves offer up to three times the lifespan of OEM titanium valves.\n \n- Complete Kit: Includes steel intake valves and stronger, purpose-designed valve springs.\n \n- Easy Installation: Designed to replace OEM components directly, using existing hardware.\n \n- Manufacturer: Pro-X Racing.","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 250F","cc":null,"notes":null,"years":"2007–2008"}],"collections":[{"name":"Cam & Valvetrain","url":"https://www.2brosparts.com/api/agent/collection/GB/cam-valvetrain"},{"name":"Valve & Spring Kit","url":"https://www.2brosparts.com/api/agent/collection/GB/valve-spring-kit"}],"links":{"page":"https://www.2brosparts.com/products/kit-in-valvespring-kxf250-prox-28sis4336-2-intake","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/5f26db9c2185:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/5f26db9c2185:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}