{"product_id":"mahle-ms-4-080in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings","title":"Mahle MS 4.080in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings","description":"\u003cp\u003eThe Mahle piston ring set identified by manufacturer part number 4085MS-112 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 product title alone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExact manufacturer part number for application verification\u003c\/li\u003e\n\u003cli\u003eMeasured dimensions organized in the specifications\u003c\/li\u003e\n\u003cli\u003eDesigned for professional engine machining and assembly\u003c\/li\u003e\n\u003cli\u003eRequires final clearance and compatibility checks before installation\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 ring and piston dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired Verification\u003c\/th\u003e\n\u003ctd\u003eBore, ring-groove dimensions, ring thickness, cylinder count, material, and intended 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\u003eMahle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e4085MS-112\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\u003eManufacturer Guide Match\u003c\/th\u003e\n\u003ctd\u003eExact part number verified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4.080 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Preparation\u003c\/th\u003e\n\u003ctd\u003eFile fit\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 Mahle piston ring set in the exact configuration stated in the specifications. Pistons and installation tools are not included unless explicitly listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout Mahle\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMahle develops pistons, piston rings, bearings, filtration, thermal-management, and engine components for original-equipment, replacement, and motorsport applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRelated Mahle Products\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/collections\/mahle\"\u003eShop all Mahle products\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/mahle-ms-4-030in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings\"\u003eMahle MS 4.030in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/mahle-ms-4-070in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings\"\u003eMahle MS 4.070in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/mahle-ms-3-927in-005in-1-0mm-1-0mm-2-0mm-4cyl-file-fit-rings\"\u003eMahle MS 3.927in+.005in 1.0mm 1.0mm 2.0mm 4cyl File Fit Rings\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 Mahle 4085MS-112 is the correct ring set?\u003c\/strong\u003e\u003cbr\u003eMatch the finished bore, piston groove dimensions, top, second, and oil-ring thicknesses, cylinder count, and intended engine use. A matching bore alone is not enough.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo these piston rings require filing?\u003c\/strong\u003e\u003cbr\u003eThe listed preparation is File fit. Measure every ring in its assigned cylinder and follow the current MAHLE instructions for the bore, fuel, boost, heat load, and intended use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan piston rings be installed without measuring the cylinders?\u003c\/strong\u003e\u003cbr\u003eNo. A qualified machine shop should measure bore diameter, taper, out-of-round, surface finish, piston groove clearance, ring end gap, and oil-ring fit before assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation Instructions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eUse the current Mahle instructions for part number 4085MS-112 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":"Mahle","offers":[{"title":"Default Title","offer_id":41805126402127,"sku":"MHL4085MS-112","price":135.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/mahle-mhl4085ms-112-piston-ring-set-image-01.png?v=1788773534","url":"https:\/\/www.blackopsautoworks.com\/en-ca\/products\/mahle-ms-4-080in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings","provider":"Black Ops Auto Works","version":"1.0","type":"link"}