{"product_id":"je-pistons-ring-sets-1-2-1-2-2-5-99-50","title":"JE Pistons Ring Sets 1.2-1.2-2.5-99.50","description":"\u003cp\u003eThe JE Pistons piston ring set identified by manufacturer part number JC3104-3917 is designed to seal combustion pressure, control oil, and transfer heat when matched to the exact piston grooves and finished bore. Final compatibility depends on the complete engine combination and measured dimensions, not the part title alone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExact official JE Pistons part number and GTIN\u003c\/li\u003e\n\u003cli\u003eOfficial dimensions and material recorded in the specifications\u003c\/li\u003e\n\u003cli\u003eDesigned for measured performance-engine assembly\u003c\/li\u003e\n\u003cli\u003eRequires professional clearance and compatibility verification\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment Status\u003c\/th\u003e\n\u003ctd\u003eUniversal only by exact component dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired Verification\u003c\/th\u003e\n\u003ctd\u003eBore or pin diameter, ring or wall thickness, length, material, groove design, cylinder count, and intended engine use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eJE Pistons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eJC3104-3917\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003ePiston Ring Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment Type\u003c\/th\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGTIN\u003c\/th\u003e\n\u003ctd\u003e00193564241559\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e3.917|99.50 MM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTop Compression Ring Thickness\u003c\/th\u003e\n\u003ctd\u003e0.0472 IN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecond Compression Ring Thickness\u003c\/th\u003e\n\u003ctd\u003e0.0472 IN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOil Ring Thickness\u003c\/th\u003e\n\u003ctd\u003e0.098 IN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOne new JE Pistons piston ring set identified by manufacturer part number JC3104-3917 in the quantity and configuration stated by the official specifications. Rings, pins, locks, coatings, and installation components are included only when expressly listed for this exact part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout JE Pistons\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eJE Pistons engineers forged racing pistons, piston rings, wrist pins, locks, and related engine components for measured domestic, import, European, and professional motorsport builds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRelated JE Pistons Products\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/collections\/je-pistons\"\u003eShop all JE Pistons products\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/je-pistons-ring-sets-0-8-0-8-1-5-2-717\"\u003eJE Pistons Ring Sets 0.8-0.8-1.5-2.717\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/je-pistons-ring-sets-1-0-1-2-2-8-92-50\"\u003eJE Pistons Ring Sets 1.0-1.2-2.8-92.50\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/je-pistons-ring-sets-1-2-1-2-2-5-subaru-ej257-block-w-ej20-head\"\u003eJE Pistons Ring Sets 1.2 \/ 1.2 \/ 2.5 Subaru EJ257 Block w\/EJ20 Head\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm JE Pistons JC3104-3917 matches my engine parts?\u003c\/strong\u003e\u003cbr\u003eMatch every listed dimension and material to the piston, connecting rod, cylinder bore, and intended engine use. A similar bore or diameter alone does not confirm compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this ring set correct for a 3.917|99.50 MM cylinder bore?\u003c\/strong\u003e\u003cbr\u003eBore must match along with top, second, and oil-ring thickness, cylinder count, piston groove dimensions, and ring material. Verify all values against the exact piston before machining.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould piston-ring end gaps be used as supplied?\u003c\/strong\u003e\u003cbr\u003eNo universal gap applies to every build. Measure every ring in its assigned cylinder and set end gap using JE guidance for the bore, fuel, boost, nitrous, heat load, and intended use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation Instructions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eUse the current JE Pistons instructions for part number JC3104-3917 and the engine builder's measured assembly specifications. A qualified machine shop must verify bore finish, clearances, ring gaps, pin fit, lock installation, orientation, balance, deck height, valve clearance, compression ratio, lubrication, and break-in before operation.\u003c\/p\u003e","brand":"JE Pistons","offers":[{"title":"Default Title","offer_id":41533831839823,"sku":"JEPJC3104-3917","price":123.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/je-pistons-jepjc3104-3917-piston-ring-set-image-01.jpg?v=1788723347","url":"https:\/\/www.blackopsautoworks.com\/en-ca\/products\/je-pistons-ring-sets-1-2-1-2-2-5-99-50","provider":"Black Ops Auto Works","version":"1.0","type":"link"}