{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"dd1e86260984","name":"KIT IN VALVE+SPRING RM-Z250, PROX 28.SIS4335-2 INTAKE KXF","sku":"65-K178.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":6,"price":{"amount":152.27,"formatted":"£152.27"},"summary":"ProX Steel INTAKE Valve and Spring Kit. This kit contains steel intake valves and specially designed stronger valve springs. ProX titanium to steel conversion kits extend lifespan up to 3 times the OEM titanium valves. The ProX kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SIS4335-2. Weight 128g.","attributes":[{"label":"General Product Group","value":"Cam & Valvetrain"},{"label":"General Product Type","value":"Valve & Spring Kit"},{"label":"Variant Id","value":"264494"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K178_2EPX/748aa64b9ca51da1.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K178_2EPX/748aa64b9ca51da1.jpg"],"description":"ProX Steel INTAKE Valve and Spring Kit. This kit contains steel intake valves and specially designed stronger valve springs. ProX titanium to steel conversion kits extend lifespan up to 3 times the OEM titanium valves. The ProX kit replaces OEM valves and valve springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SIS4335-2. Weight 128g.","descriptionMarkdown":"### Pro-X Steel Intake Valve and Spring Kit\n\nUpgrade your motorcycle's performance and durability with the Pro-X Steel Intake Valve and Spring Kit. This kit is designed as a direct replacement for your original equipment titanium valves and valve springs, offering a significant improvement in lifespan.\n\n**Key Features:**\n\n \n- Extended Lifespan: Pro-X steel valves are engineered to last up to three times longer than OEM titanium valves, providing superior wear resistance.\n \n- Complete Kit: Includes a set of high-quality steel intake valves and specially designed, stronger valve springs. The heavier steel valves require the use of more robust springs for optimal performance.\n \n- Easy Installation: This kit replaces OEM valves and springs. You can utilize your existing OEM retainers, bases, and valve seats for a straightforward installation process.\n \n- Durable Construction: Made with high-grade steel for reliability and longevity.","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 250F","cc":null,"notes":null,"years":"2004–2006"},{"make":"SUZUKI","model":"RM-Z 250","cc":null,"notes":null,"years":"2004–2006"}],"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-rm-z250-prox-28sis4335-2-intake-kxf","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/dd1e86260984:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/dd1e86260984:1"}},"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."]}}