{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"027d5bc853a5","name":"KIT EX VALVE+SPRING YZF250, PROX 28.SES2402-1 GASGAS, EXHAUST","sku":"65-K100.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 Exhaust Valve and HD Spring Kit. This kit includes steel exhaust valves and stronger valve springs designed to replace OEM valves and springs. The steel valves offer up to three times the lifespan of OEM titanium valves. The kit can be installed using OEM retainers, bases, and valve seats.","attributes":[{"label":"General Product Group","value":"Cam & Valvetrain"},{"label":"General Product Type","value":"Valve & Spring Kit"},{"label":"Variant Id","value":"264447"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K100_2EPX/2ccd9929d358b0b7.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K100_2EPX/2ccd9929d358b0b7.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K100_2EPX/3cf34ce9f5c3e255.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K100_2EPX/3e97ad87646aa352.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K100_2EPX/daa546158ade6222.jpg"],"description":"Prox Steel Exhaust Valve and HD Spring Kit. This kit includes steel exhaust valves and stronger valve springs designed to replace OEM valves and springs. The steel valves offer up to three times the lifespan of OEM titanium valves. The kit can be installed using OEM retainers, bases, and valve seats.","descriptionMarkdown":"### ProX Steel Exhaust Valve and Heavy Duty Spring Kit\n\nUpgrade your motorcycle's exhaust system with this ProX Steel Exhaust Valve and Heavy Duty Spring Kit. Designed as a direct replacement for your original exhaust valves and springs, this kit offers enhanced durability and performance.\n\nProX specializes in high-quality conversion kits, and this steel valve kit is no exception. It provides a significantly extended lifespan compared to standard OEM titanium valves, offering up to three times the longevity. The kit includes a set of robust steel exhaust valves along with specially designed, stronger valve springs. This is crucial because the increased weight of steel valves necessitates a heavier spring for optimal function.\n\nThe ProX kit is engineered for a seamless installation, utilizing your motorcycle's original retainers, bases, and valve seats. This simplifies the replacement process, allowing you to benefit from improved valve performance without complex modifications.\n\n \n- Durable Steel Construction: Offers superior longevity over OEM titanium valves.\n \n- Extended Lifespan: Provides up to three times the service life of standard titanium valves.\n \n- Complete Kit: Includes steel exhaust valves and specially designed heavy duty valve springs.\n \n- Optimized Performance: Heavier springs are included to compensate for the increased weight of steel valves.\n \n- Easy Installation: Replaces OEM valves and springs using existing retainers, bases, and valve seats.","weightGrams":null,"fitments":[{"make":"GAS-GAS","model":"EC F 250","cc":null,"notes":null,"years":"2010–2015"},{"make":"GAS-GAS","model":"EC F 300","cc":null,"notes":null,"years":"2013–2015"},{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2001–2013"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2001–2013"}],"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-yzf250-prox-28ses2402-1-gasgas-exhaust","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/027d5bc853a5:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/027d5bc853a5:1"}},"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."]}}