{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"791efb8a7388","name":"PISTON KIT 02-07 KTM EXC450 89, WOSSNER WOSSNER 8581DC","sku":"56-W178.C","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 89.02mm bore. Features optimized heat transfer to cylinder walls and an elliptical design for uniform bearing surface and even thrust load distribution. Manufactured in Germany for durability and precision. Bore: 89.02mm (+0.02mm oversize). Standard size piston (PN# 8581DC). Lock Part Number: CW20. Pin Part Number: WP038. Ring Set Part Number: 890XSY. Displacement: 449 cm&sup3;. Stroke: 72.00mm. Clearance: 0.04mm. Wossner Compression Ratio: OEM. OEM Compression Ratio: 11.10:1. Dome Volume: +7.10 cm&sup3;. Compression Height: 23.50mm.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"89mm"},{"label":"Variant Id","value":"254869"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock53815_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock53815_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53815_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53815_3.jpg"],"description":"Wossner forged piston kit with an 89.02mm bore. Features optimized heat transfer to cylinder walls and an elliptical design for uniform bearing surface and even thrust load distribution. Manufactured in Germany for durability and precision. Bore: 89.02mm (+0.02mm oversize). Standard size piston (PN# 8581DC). Lock Part Number: CW20. Pin Part Number: WP038. Ring Set Part Number: 890XSY. Displacement: 449 cm&sup3;. Stroke: 72.00mm. Clearance: 0.04mm. Wossner Compression Ratio: OEM. OEM Compression Ratio: 11.10:1. Dome Volume: +7.10 cm&sup3;. Compression Height: 23.50mm.","descriptionMarkdown":"### Wossner 89.02mm Forged Piston Kit\n\nUpgrade your motorcycle's performance with this Wossner forged piston kit. Engineered for precision and durability, this kit features a 89.02mm bore and is manufactured in Germany to the highest standards.\n\n#### Key Features\n\n\t\n- Forged piston construction for superior strength and advanced design.\n\t\n- Optimized for excellent heat transfer to the cylinder walls, promoting efficient combustion.\n\t\n- Elliptical piston design ensures a uniform bearing surface and even thrust load distribution, reducing localized pressure and preventing piston collapse under heat expansion.\n\t\n- Made in Germany, guaranteeing precision engineering and high-quality manufacturing.\n\n#### Specifications\n\n\t\n- Bore Size: 89.02mm (+0.02mm oversize)\n\t\n- Standard Size Piston Part Number: 8581DC\n\t\n- Lock Ring Part Number: CW20\n\t\n- Piston Pin Part Number: WP038\n\t\n- Ring Set Part Number: 890XSY\n\t\n- Engine Displacement: 449 cm&sup3;\n\t\n- Stroke Length: 72.00mm\n\t\n- Recommended Clearance: 0.04mm\n\t\n- Wossner Compression Ratio: OEM Equivalent\n\t\n- OEM Compression Ratio: 11.10:1\n\t\n- Dome Volume: +7.10 cm&sup3;\n\t\n- Compression Height: 23.50mm","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-8581dc","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/791efb8a7388:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/791efb8a7388:1"}},"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."]}}