{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"19a3c7e1102f","name":"KIT EX VALVE+SPRING RM-Z450 2008-2025, PROX 28.SES3408-1 EXHAUST","sku":"65-K109.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":140.5,"formatted":"£140.50"},"summary":"Prox steel exhaust valve and spring kit. This kit contains steel exhaust valves and stronger valve springs designed to replace OEM valves and springs. The steel valves offer an extended lifespan compared to OEM titanium valves. The kit can be installed using OEM retainers, bases, and valve seats. Part number 28.SES3408-1.","attributes":[{"label":"General Product Group","value":"Cam & Valvetrain"},{"label":"General Product Type","value":"Valve & Spring Kit"},{"label":"Variant Id","value":"264456"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K109_2EPX/95dec4816ab9fb43.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K109_2EPX/95dec4816ab9fb43.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/65-K109_2EPX/85293f9c03746185.jpg"],"description":"Prox steel exhaust valve and spring kit. This kit contains steel exhaust valves and stronger valve springs designed to replace OEM valves and springs. The steel valves offer an extended lifespan compared to OEM titanium valves. The kit can be installed using OEM retainers, bases, and valve seats. Part number 28.SES3408-1.","descriptionMarkdown":"### ProX Steel Exhaust Valve and Spring Kit\n\nThis ProX Steel Exhaust Valve and Spring Kit offers a durable and cost-effective solution for your motorcycle's engine. Designed as a steel conversion for OEM titanium valves, this kit significantly extends the lifespan of your exhaust valves, providing up to three times the wear resistance of standard titanium components.\n\nEach kit includes a set of high-quality steel exhaust valves and specially designed stronger valve springs. The heavier steel valves necessitate the use of more robust springs to ensure optimal performance and valve train function. This 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- Steel conversion for extended valve life\n \n- Up to 3x longer lifespan compared to OEM titanium valves\n \n- Includes steel exhaust valves and stronger valve springs\n \n- Direct replacement for OEM components\n \n- Utilizes OEM retainers, bases, and valve seats\n \n- Manufactured by Pro-X Racing for reliable performance","weightGrams":null,"fitments":[{"make":"SUZUKI","model":"RM-Z 450","cc":null,"notes":null,"years":"2008–2025"},{"make":"SUZUKI","model":"RMX Z 450","cc":null,"notes":null,"years":"2010–2019"}],"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-rm-z450-2008-2025-prox-28ses3408-1-exhaust","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/19a3c7e1102f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/19a3c7e1102f: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."]}}