{"product_id":"mahle-ms-3-662in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings","title":"MAHLE Performance 3.662-Inch File-Fit Piston Ring Set for 8 Cylinders","description":"\u003ch4\u003eControl compression and oil with a thin-ring eight-cylinder package\u003c\/h4\u003e\u003cp\u003eMAHLE Motorsport 3667MS-112 supplies eight file-fit cylinder sets for a 3.662-inch finished bore. The 1.0 mm, 1.0 mm, and 2.0 mm package combines low cross-section compression rings with a standard-tension oil-control assembly for precision engine builds.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEight-cylinder piston-ring set\u003c\/li\u003e\n\u003cli\u003e3.662-inch finished bore size\u003c\/li\u003e\n\u003cli\u003e+.005-inch file-fit configuration\u003c\/li\u003e\n\u003cli\u003e1.0 mm top compression ring\u003c\/li\u003e\n\u003cli\u003e1.0 mm second compression ring\u003c\/li\u003e\n\u003cli\u003e2.0 mm standard-tension oil-control assembly\u003c\/li\u003e\n\u003cli\u003eSteel HV385-treated top ring, phosphate-coated steel second ring, and chrome-faced stainless-steel oil ring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRequired Bore\u003c\/th\u003e\n\u003cth\u003eRequired Configuration\u003c\/th\u003e\n\u003cth\u003eExclusions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eUniversal eight-cylinder performance engine build\u003c\/td\u003e\n\u003ctd\u003e3.662-inch finished bore\u003c\/td\u003e\n\u003ctd\u003e1.0 \/ 1.0 \/ 2.0 mm file-fit ring grooves and builder-specified end gaps\u003c\/td\u003e\n\u003ctd\u003eNot a drop-in set; not for a different bore, groove package, cylinder count, or unverified engine configuration\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e3667MS-112\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePerformance piston-ring set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Count\u003c\/td\u003e\n\u003ctd\u003eEight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinished Bore\u003c\/td\u003e\n\u003ctd\u003e3.662 inches \/ 93.014 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit Style\u003c\/td\u003e\n\u003ctd\u003e+.005-inch file fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Ring\u003c\/td\u003e\n\u003ctd\u003e1.0 mm steel with HV385 thermal facing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecond Ring\u003c\/td\u003e\n\u003ctd\u003e1.0 mm phosphate-coated steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOil Ring\u003c\/td\u003e\n\u003ctd\u003e2.0 mm standard-tension stainless steel with chrome facing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGapless\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas Ported\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEight top compression rings\u003c\/li\u003e\n\u003cli\u003eEight second compression rings\u003c\/li\u003e\n\u003cli\u003eEight three-piece oil-control assemblies\u003c\/li\u003e\n\u003cli\u003ePistons, wrist pins, locks, bearings, gaskets, ring compressor, measuring tools, and installation labor are not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout MAHLE Motorsport\u003c\/h4\u003e\u003cp\u003eMAHLE Motorsport develops pistons, rings, pins, and related components for racing and performance engine programs. Its ring sets are selected by exact bore, groove dimensions, ring thickness, cylinder count, material package, tension, and required fitting method.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePistons with verified 1.0 \/ 1.0 \/ 2.0 mm ring grooves and 3.662-inch bore compatibility\u003c\/li\u003e\n\u003cli\u003ePrecision ring filer and ring-squaring tool\u003c\/li\u003e\n\u003cli\u003eFeeler gauges, bore gauge, and micrometers suitable for engine assembly\u003c\/li\u003e\n\u003cli\u003eRing compressor sized for the finished bore and piston design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the 3667MS-112?\u003c\/strong\u003e\u003cp\u003eIt is an eight-cylinder Performance Series piston-ring set for 3.662-inch finished bores, with file-fit end gaps and standard-tension oil control.\u003c\/p\u003e\u003cstrong\u003eHow many cylinders does this set service?\u003c\/strong\u003e\u003cp\u003eThe package contains eight cylinder sets.\u003c\/p\u003e\u003cstrong\u003eWhat ring thicknesses are included?\u003c\/strong\u003e\u003cp\u003eEach cylinder set uses a 1.0 mm top ring, a 1.0 mm second ring, and a 2.0 mm oil-control assembly.\u003c\/p\u003e\u003cstrong\u003eAre these rings drop-in?\u003c\/strong\u003e\u003cp\u003eNo. They are file-fit rings and must be measured and filed to the engine builder's verified end-gap specifications.\u003c\/p\u003e\u003cstrong\u003eWhat is the finished bore size?\u003c\/strong\u003e\u003cp\u003eMAHLE specifies a 3.662-inch, or 93.014 mm, finished bore with the file-fit allowance identified for this set.\u003c\/p\u003e\u003cstrong\u003eWhat materials and finishes are used?\u003c\/strong\u003e\u003cp\u003eSummit lists a steel HV385-treated top ring, phosphate-coated steel second ring, and a chrome-faced stainless-steel oil ring assembly.\u003c\/p\u003e\u003cstrong\u003eIs this set tied to one vehicle?\u003c\/strong\u003e\u003cp\u003eNo. Selection is based on finished bore, ring-groove dimensions, cylinder count, end-gap target, and the engine builder's requirements.\u003c\/p\u003e\u003cstrong\u003eCan the rings be installed without measuring the cylinders?\u003c\/strong\u003e\u003cp\u003eNo. Measure each bore and ring gap, confirm ring orientation, and follow the piston and engine builder's current specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm the engine has eight 3.662-inch finished bores and pistons with compatible 1.0 \/ 1.0 \/ 2.0 mm ring grooves.\u003c\/li\u003e\n\u003cli\u003eMeasure every cylinder for size, taper, and out-of-round condition before fitting any ring.\u003c\/li\u003e\n\u003cli\u003eVerify the package and manufacturer part number before separating or filing the rings.\u003c\/li\u003e\n\u003cli\u003eSquare each ring in its assigned cylinder and measure the end gap with clean feeler gauges.\u003c\/li\u003e\n\u003cli\u003eFile the ring ends gradually to the piston or engine builder's current end-gap specification, keeping the ends square and deburred.\u003c\/li\u003e\n\u003cli\u003eClean the rings and grooves, identify the top and second ring orientation, and assemble the three-piece oil-control rings without overlapping the expander ends.\u003c\/li\u003e\n\u003cli\u003eStagger ring gaps according to the piston and engine builder's instructions, then compress the rings with the correct tool.\u003c\/li\u003e\n\u003cli\u003eInstall each piston in its assigned cylinder, verify free movement, and complete the engine assembly to the applicable torque, lubrication, and break-in procedures.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65 Warning:\u003c\/strong\u003e Cancer and reproductive harm. See www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Mahle","offers":[{"title":"Default Title","offer_id":67987084050511,"sku":"MHL3667MS-112","price":131.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/mahle-3667ms-112-3662-inch-eight-cylinder-ring-set-01.webp?v=1793738515","url":"https:\/\/www.blackopsautoworks.com\/products\/mahle-ms-3-662in-005in-1-0mm-1-0mm-2-0mm-file-fit-rings","provider":"Black Ops Auto Works","version":"1.0","type":"link"}