{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"ed0b64cee4bc","name":"YAMAHA YZ 250 1999-2022 GRADE C 66.36mm TWIN RING PISTON","sku":"V.2584C","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":5,"price":{"amount":202.42,"formatted":"£202.42"},"summary":"Vertex pistons are made with Low-Ex (low expansion) Silicon aluminium alloys, containing 12%, 18%, or 21% silicon depending on the application. These pistons are produced using gravity casting or hydraulic forging, followed by a hi-tech Heat Treatment process in an automatic HT implant with hot water quenching. This heat treating method is cutting-edge technology for these aluminium alloys. Machining is performed using the latest CNC machines and software with diamond tools, achieving specific surface finishes based on the piston's final application. Each Vertex piston undergoes a rigorous manual and automatic quality control process. Vertex pistons feature a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating, developed from Formula One engine technology, offers increased hardness and surface porosity for superior Molybdenum Coating adhesion, doubling coating durability. This piston is Grade C and 66.36mm with twin rings.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-c-66.36mm-twin-ring-piston-7170-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-c-66.36mm-twin-ring-piston-7170-p.jpg"],"description":"Vertex pistons are made with Low-Ex (low expansion) Silicon aluminium alloys, containing 12%, 18%, or 21% silicon depending on the application. These pistons are produced using gravity casting or hydraulic forging, followed by a hi-tech Heat Treatment process in an automatic HT implant with hot water quenching. This heat treating method is cutting-edge technology for these aluminium alloys. Machining is performed using the latest CNC machines and software with diamond tools, achieving specific surface finishes based on the piston's final application. Each Vertex piston undergoes a rigorous manual and automatic quality control process. Vertex pistons feature a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating, developed from Formula One engine technology, offers increased hardness and surface porosity for superior Molybdenum Coating adhesion, doubling coating durability. This piston is Grade C and 66.36mm with twin rings.","descriptionMarkdown":"### Vertex Grade C 66.36mm Twin Ring Piston\n\nEnhance your engine performance and reliability with this premium Vertex twin ring piston. Engineered for precision and durability, Vertex pistons are the industry standard for those seeking optimal power delivery and long term engine health.\n\n### Advanced Manufacturing and Material Quality\n\nEach piston is crafted from exotic Low-Ex silicon charged aluminium alloys. Depending on the specific application, these alloys contain 12%, 18%, or 21% silicon to ensure superior thermal expansion control and structural integrity. Using advanced gravity cast or hydraulic forging processes, every blank undergoes a sophisticated heat treatment in an automated system, followed by a precision hot water quench to refine the material structure.\n\n### Precision Machining\n\nVertex utilizes state of the art CNC machinery and software combined with diamond tipped tooling to achieve exact specifications. This ensures every piston meets the precise surface finish requirements necessary for high performance engine environments.\n\n### Enhanced Coatings for Performance\n\n \n- Molybdenum Bisulphite Coating: A high performance black coating applied to the piston skirt to assist in the initial break in process and significantly reduce internal friction during operation.\n \n- Phosphate Coating: Borrowing technology from Formula One engine development, these pistons feature an all over phosphate coating. This adds surface hardness and a controlled porosity that dramatically improves the adhesion of the Molybdenum coating, doubling its durability and lifespan.\n\n### Quality Control\n\nTo maintain the highest standards, every Vertex piston undergoes a rigorous multi stage quality control process. This includes both manual inspections and automatic electronic checks to ensure the highest quality levels are achieved before the product reaches your engine.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yz-250-1999-2022-grade-c-6636mm-twin-ring-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/ed0b64cee4bc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/ed0b64cee4bc: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."]}}