{"product_id":"bbtv-2c4181-engine-piston-ring","title":"BBTV 2C4181 Engine Piston Ring","description":"\u003ch2\u003eEngine Piston Ring Set Overview\u003c\/h2\u003e\u003cp\u003eThis engine piston ring set is built for standard-bore applications with a 77.00 mm bore and chrome-treated top ring surfaces. It is a direct fit for select Mini Cooper and BMW 118i applications, including 2006-2016 Mini Cooper and 2012-2015 BMW 118i listings shown in the fitment data.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard size with a 3.031 in. \/ 77.00 mm engine bore\u003c\/li\u003e\n\u003cli\u003eChrome top ring surface treatment for improved wear resistance\u003c\/li\u003e\n\u003cli\u003eGrey iron second ring for stable sealing performance\u003c\/li\u003e\n\u003cli\u003eSteel top ring construction for durability under combustion load\u003c\/li\u003e\n\u003cli\u003eSteel rail and stainless expander oil ring design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003ePart number 2C4181 is an engine piston ring set for 4-cylinder applications using a standard bore. The ring package includes a chrome top ring, grey iron second ring, and a steel rail\/stainless expander oil ring arrangement, with groove dimensions listed at 1.20 mm for the top ring, 1.50 mm for the second ring, and 2.00 mm for the oil ring. These specifications matter when matching the ring set to the correct piston and cylinder dimensions in Mini Cooper and BMW 118i engines. Part number 2C4181 is listed for multiple model years, so confirming bore size and groove dimensions before installation is essential.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestoring cylinder sealing when compression has dropped\u003c\/li\u003e\n\u003cli\u003eReducing oil control issues caused by worn ring packs\u003c\/li\u003e\n\u003cli\u003eAddressing excessive blow-by from worn piston rings\u003c\/li\u003e\n\u003cli\u003eReplacing rings during an engine rebuild or refresh\u003c\/li\u003e\n\u003cli\u003eMatching standard-bore piston and cylinder specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the engine bore, piston groove widths, and ring end-gap requirements before assembly. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 08-444800-00, 081RS001040N0) for the same application. Confirm the fitment details for your Mini Cooper or BMW 118i engine before ordering, since the listed applications span multiple years and engine configurations.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eUse the published bore, groove, and material specifications to confirm correct application before installation. Part number 2C4181 is cataloged with fitment data for select Mini Cooper and BMW 118i vehicles.\u003c\/p\u003e","brand":"BBTV","offers":[{"title":"Default Title","offer_id":53669301780661,"sku":"BBTV-2C4181","price":61.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/HA_2C4181_Fro.jpg?v=1793686190","url":"https:\/\/www.partcatalog.com\/products\/bbtv-2c4181-engine-piston-ring","provider":"PartCatalog","version":"1.0","type":"link"}