{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"320e16c29d3b","name":"PISTON KIT 02-07 KTM EXC450 89, WOSSNER WOSSNER 8581DA 59430007000","sku":"56-W178.A","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":207.83,"formatted":"£207.83"},"summary":"Wossner forged piston kit with an 89mm bore. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision. Features forged piston for superior strength and design, optimized heat transfer to cylinder walls, and elliptical design for uniform bearing surface and even thrust load distribution. Specifications include a bore of 89mm, standard size piston (PN# 8581DA), lock part number CW20, pin part number WP038, and ring set part number 890XSY. Displacement is 449 cm&sup3; with a stroke of 72.00mm and a clearance of 0.04mm. Wossner Compression Ratio is OEM, OEM Compression Ratio is 11.10:1, dome volume is +7.10 cm&sup3;, and compression height is 23.50mm. Cross-reference OEM part numbers include 59430007000 and 4941M08900.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"89mm"},{"label":"Variant Id","value":"254864"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W178_2EA/830c4695ebbb931d.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W178_2EA/830c4695ebbb931d.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W178_2EA/ddea27e681107e65.jpg"],"description":"Wossner forged piston kit with an 89mm bore. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision. Features forged piston for superior strength and design, optimized heat transfer to cylinder walls, and elliptical design for uniform bearing surface and even thrust load distribution. Specifications include a bore of 89mm, standard size piston (PN# 8581DA), lock part number CW20, pin part number WP038, and ring set part number 890XSY. Displacement is 449 cm&sup3; with a stroke of 72.00mm and a clearance of 0.04mm. Wossner Compression Ratio is OEM, OEM Compression Ratio is 11.10:1, dome volume is +7.10 cm&sup3;, and compression height is 23.50mm. Cross-reference OEM part numbers include 59430007000 and 4941M08900.","descriptionMarkdown":"### Wossner 89mm Piston Kit for High Performance Engines\n\nUpgrade your engine's performance and durability with this precision-engineered Wossner forged piston kit. Designed for optimal combustion efficiency and longevity, this kit is manufactured in Germany to the highest standards.\n\n**Key Features:**\n\n\t\n- Forged Piston Construction: Offers superior strength and a more robust design compared to cast pistons, ensuring reliable performance under demanding conditions.\n\t\n- Optimized Heat Transfer: Engineered to efficiently transfer combustion chamber heat to the cylinder walls, preventing localized hot spots and contributing to overall engine health.\n\t\n- Elliptical Design: Features an elliptical piston skirt for uniform bearing surface distribution, adapting to heat expansion. This reduces localized pressure and mitigates the risk of piston collapse, ensuring consistent operation.\n\t\n- German Manufacturing: Crafted in Germany, guaranteeing exceptional quality, precision, and durability.\n\n**Specifications:**\n\n\t\n- Bore Diameter: 89mm\n\t\n- Piston Part Number: 8581DA\n\t\n- Lock Part Number: CW20\n\t\n- Pin Part Number: WP038\n\t\n- Ring Set Part Number: 890XSY\n\t\n- Displacement: 449 cm&sup3;\n\t\n- Stroke: 72.00mm\n\t\n- Piston Clearance: 0.04mm\n\t\n- Dome Volume: +7.10 cm&sup3;\n\t\n- Compression Height: 23.50mm\n\t\n- Wossner Compression Ratio: OEM\n\t\n- OEM Compression Ratio: 11.10:1\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- 59430007000\n\t\n- 4941M08900","weightGrams":null,"fitments":[{"make":"BETA","model":"RR 450","cc":null,"notes":null,"years":"2005–2009"},{"make":"BETA","model":"RR ENDURO 4T 450","cc":null,"notes":null,"years":"2005–2009"},{"make":"KTM","model":"450 EXC","cc":null,"notes":"1st Filter (Long)","years":"2003–2007"},{"make":"KTM","model":"450 EXC R","cc":null,"notes":null,"years":"2003–2007"},{"make":"KTM","model":"450 EXC Racing","cc":null,"notes":"1st Filter","years":"2003–2007"},{"make":"KTM","model":"450 XC","cc":null,"notes":null,"years":"2008–2009"},{"make":"KTM","model":"450 XC ATV","cc":null,"notes":null,"years":"2008–2009"},{"make":"POLARIS","model":"OUTLAW MXR 450","cc":null,"notes":null,"years":"2008–2011"}],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Pistons & Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/pistons-kits"}],"links":{"page":"https://www.2brosparts.com/products/piston-kit-02-07-ktm-exc450-89-wossner-wossner-8581da-59430007000","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/320e16c29d3b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/320e16c29d3b: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."]}}