{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0ddb76405a06","name":"PISTON KIT 97-18 MC EC 66.40, PROX 01.7307.A GASGAS","sku":"56-W157.A.PROX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.22,"formatted":"£172.22"},"summary":"ProX 2-ring piston kit 66.40mm. This kit includes piston rings, wrist pin, and circlips. ProX pistons are precision machined on CNC equipment and use a low-expansion, low-friction piston alloy. Features an OEM-style tin coating for break-in assistance. Cross reference numbers: 56-W157.A.PROX, 01.7307.A. For spare rings, use prox 02.7307, nominal size 66.33mm.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"66.4mm"},{"label":"Variant Id","value":"254751"}],"image":"https://www.oro2u.com/media/catalog/product/5/6/56-w157-a-prox.jpg","images":["https://www.oro2u.com/media/catalog/product/5/6/56-w157-a-prox.jpg"],"description":"ProX 2-ring piston kit 66.40mm. This kit includes piston rings, wrist pin, and circlips. ProX pistons are precision machined on CNC equipment and use a low-expansion, low-friction piston alloy. Features an OEM-style tin coating for break-in assistance. Cross reference numbers: 56-W157.A.PROX, 01.7307.A. For spare rings, use prox 02.7307, nominal size 66.33mm.","descriptionMarkdown":"### ProX Piston Kit - 66.40mm Bore\n\nUpgrade your engine's performance with a ProX Piston Kit. This 2-ring piston is precision machined using advanced CNC equipment and crafted from a low-expansion, low-friction alloy, identical to that used by major Japanese engine manufacturers. The kit includes everything needed for installation: piston rings, wrist pin, and circlips.\n\nFeaturing an OEM-style tin coating, this piston aids in a smooth break-in process for your machine. This kit is designed for a nominal bore size of 66.33mm and a piston diameter of 66.40mm.\n\n### Key Features:\n\n \n- 2-ring piston design\n \n- Precision machined on state-of-the-art CNC equipment\n \n- Constructed from a low-expansion, low-friction alloy\n \n- Includes piston rings, wrist pin, and circlips\n \n- OEM-style tin coating for assisted break-in\n \n- Nominal bore size: 66.33mm\n \n- Piston diameter: 66.40mm","weightGrams":null,"fitments":[{"make":"GAS-GAS","model":"EC 250","cc":null,"notes":null,"years":"1997–2019"},{"make":"GAS-GAS","model":"EC R 250","cc":null,"notes":null,"years":"2014–2020"},{"make":"GAS-GAS","model":"MC 250","cc":null,"notes":null,"years":"1997–2019"},{"make":"GAS-GAS","model":"MX 250","cc":null,"notes":null,"years":"1997–2019"},{"make":"GAS-GAS","model":"SM 250","cc":null,"notes":null,"years":"1997–2008"},{"make":"GAS-GAS","model":"XC 250","cc":null,"notes":null,"years":"1997–2019"}],"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-97-18-mc-ec-6640-prox-017307a-gasgas","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0ddb76405a06:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0ddb76405a06:1"}},"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."]}}