{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c12372d912fc","name":"KIT EX VALVE+SPRING YZF450, PROX 28.SES2424-1 GAS-GAS, EXHAUST","sku":"65-K102.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":140.48,"formatted":"£140.48"},"summary":"ProX Steel Exhaust Valve/Spring Kit. This kit contains steel exhaust valves and specially designed stronger valve springs. The steel valves extend lifespan compared to OEM titanium valves. The kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SES2424-1. Manufacturer Pro-X Racing. Weight 104g.","attributes":[{"label":"General Product Group","value":"Cam & Valvetrain"},{"label":"General Product Type","value":"Valve & Spring Kit"},{"label":"Variant Id","value":"264449"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K102_2EPX/b356bcab6ebf549d.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K102_2EPX/b356bcab6ebf549d.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K102_2EPX/2ebc27fda630f96e.jpg"],"description":"ProX Steel Exhaust Valve/Spring Kit. This kit contains steel exhaust valves and specially designed stronger valve springs. The steel valves extend lifespan compared to OEM titanium valves. The kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SES2424-1. Manufacturer Pro-X Racing. Weight 104g.","descriptionMarkdown":"### ProX Steel Exhaust Valve and Spring Kit\n\nUpgrade your motorcycle's performance and durability with the ProX Steel Exhaust Valve and Spring Kit. This kit is designed to replace your OEM titanium valves with high-strength steel, significantly extending the lifespan of your exhaust valves.\n\nProX offers an extensive selection of titanium-to-steel conversion kits. These steel exhaust valves offer up to three times the lifespan of original equipment manufacturer titanium valves. The ProX kit includes a set of steel exhaust valves along with specially designed, stronger valve springs. The increased weight of the steel valve necessitates the use of a heavier valve spring for optimal performance.\n\nThis kit is engineered for a direct replacement of OEM valves and springs. You can utilize your original retainers, bases, and valve seats during installation.\n\n**Key Features:**\n\n- Constructed with high-strength steel for enhanced durability.\n\n- Offers up to three times the lifespan of OEM titanium valves.\n\n- Includes specially designed, stronger valve springs to accommodate the heavier steel valves.\n\n- Designed for direct replacement of OEM valves and springs.\n\n- Compatible with OEM retainers, bases, and valve seats.","weightGrams":null,"fitments":[{"make":"GAS-GAS","model":"EC F 450","cc":null,"notes":null,"years":"2013–2015"},{"make":"YAMAHA","model":"WR 450F","cc":null,"notes":null,"years":"2003–2015"},{"make":"YAMAHA","model":"YFZ 450","cc":null,"notes":null,"years":"2004–2009"},{"make":"YAMAHA","model":"YFZ 450 R","cc":null,"notes":null,"years":"2009–2020"},{"make":"YAMAHA","model":"YFZ R 450","cc":null,"notes":null,"years":"2009–2025"},{"make":"YAMAHA","model":"YZ 450F","cc":null,"notes":null,"years":"2003–2009"}],"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-ex-valvespring-yzf450-prox-28ses2424-1-gas-gas-exhaust","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c12372d912fc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c12372d912fc: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."]}}