{"product_id":"mahle-ms-piston-bmw-s55-84mm-bore-89-6mm-stroke-144-35mm-rod-10-5cc-10-2cr-tbc-coated-set-of-6","title":"Mahle Motorsport BMW S55 84mm Forged Piston Set - 10.2:1","description":"\u003ch4\u003eBuild the S55 rotating assembly around a coated 2618 forged piston package\u003c\/h4\u003e\u003cp\u003eMahle 197879807T gives an engine builder a matched piston package for BMW S55 3.0L inline-six. Compatibility depends on the exact engine code, finished bore, rotating assembly, cylinder head, fuel, and measured clearances.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSet of six 2618 forged aluminum pistons\u003c\/li\u003e\n\u003cli\u003eThermal-barrier crown coating\u003c\/li\u003e\n\u003cli\u003eDesigned around the BMW S55 engine geometry\u003c\/li\u003e\n\u003cli\u003eRing set, wrist pins, and locks supplied in the verified PowerPak configuration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication Type\u003c\/th\u003e\n\u003cth\u003eVerified Requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine-build specific\u003c\/td\u003e\n\u003ctd\u003eBMW S55 engine builds using the verified 84 mm bore, 89.6 mm stroke, 144.35 mm connecting rod, and 22 mm wrist pin dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYear-make-model mapping\u003c\/td\u003e\n\u003ctd\u003eNo standalone YMM fitment applies. Verify the exact engine and every build dimension before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMahle Motorsport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eForged Piston Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Family\u003c\/td\u003e\n\u003ctd\u003eBMW S55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore\u003c\/td\u003e\n\u003ctd\u003e84 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke\u003c\/td\u003e\n\u003ctd\u003e89.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnecting Rod Length\u003c\/td\u003e\n\u003ctd\u003e144.35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWrist Pin Diameter\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrown Volume\u003c\/td\u003e\n\u003ctd\u003e-10.5 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Ratio\u003c\/td\u003e\n\u003ctd\u003e10.2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston Alloy\u003c\/td\u003e\n\u003ctd\u003e2618 forged aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSet of 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eThermal-barrier crown coating\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\u003eSix forged pistons\u003c\/li\u003e\n\u003cli\u003eMatched piston ring set\u003c\/li\u003e\n\u003cli\u003eWrist pins and locks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Mahle Motorsport\u003c\/h4\u003e\u003cp\u003eMahle develops piston systems and engine components for original-equipment and motorsport applications. Its PowerPak and diesel piston packages combine application-specific geometry with materials and ring technology intended for professionally measured engine builds.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine bearings matched to the exact crankshaft and housing measurements\u003c\/li\u003e\n\u003cli\u003eConnecting rods and fasteners verified for the intended power level\u003c\/li\u003e\n\u003cli\u003eGaskets and valvetrain components selected for the final cylinder-head and deck configuration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the 197879807T?\u003c\/strong\u003e\u003cp\u003eIt is the Mahle piston package described in the Specifications table for the listed engine family and measured build requirements.\u003c\/p\u003e\u003cstrong\u003eIs this selected by vehicle year alone?\u003c\/strong\u003e\u003cp\u003eNo. Engine code, bore, stroke, rod length, wrist pin, cylinder head, compression target, and machine-shop measurements must all agree.\u003c\/p\u003e\u003cstrong\u003eIs machining required?\u003c\/strong\u003e\u003cp\u003eA qualified machine shop must inspect and measure the block, bores, deck, crankshaft, rods, pins, rings, and clearances before assembly.\u003c\/p\u003e\u003cstrong\u003eAre piston rings included?\u003c\/strong\u003e\u003cp\u003eThe What's Included section states the verified ring-set contents for this exact package.\u003c\/p\u003e\u003cstrong\u003eCan parts from a similar kit be substituted?\u003c\/strong\u003e\u003cp\u003eNo. Pistons, pins, locks, and rings must match the exact dimensions and configuration specified for this package.\u003c\/p\u003e\u003cstrong\u003eWhat clearances must be checked?\u003c\/strong\u003e\u003cp\u003eVerify piston-to-wall clearance, ring end gaps, pin fit, deck height, piston-to-valve clearance, bearing clearances, and final compression ratio.\u003c\/p\u003e\u003cstrong\u003eIs professional assembly recommended?\u003c\/strong\u003e\u003cp\u003eYes. These are precision engine components that require cleaning, measurement, balancing, correct orientation, controlled fastener torque, and documented final clearances.\u003c\/p\u003e\u003cstrong\u003eWhat should be confirmed before ordering?\u003c\/strong\u003e\u003cp\u003eConfirm the engine family, finished bore, stroke, connecting rod, wrist pin, cylinder head, intended fuel, boost level, and compression target with the engine builder.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm the package label identifies Mahle 197879807T and compare every supplied component with the build sheet.\u003c\/li\u003e\n\u003cli\u003eHave the block, crankshaft, rods, bores, deck, and cylinder heads measured by a qualified machine shop.\u003c\/li\u003e\n\u003cli\u003eClean all components and oil passages according to Mahle and engine-builder procedures.\u003c\/li\u003e\n\u003cli\u003eMeasure piston-to-wall clearance and file each ring for its assigned cylinder and operating conditions.\u003c\/li\u003e\n\u003cli\u003eVerify pin fit, lock engagement, piston orientation, deck height, valve clearance, balance, and compression ratio.\u003c\/li\u003e\n\u003cli\u003eAssemble with the specified lubricants, fastener procedures, torque values, and final inspection records.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Mahle","offers":[{"title":"Default Title","offer_id":67969093435471,"sku":"MHL197879807T","price":1276.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/mahle-197879807t-forged-piston-set-01.webp?v=1793560684","url":"https:\/\/www.blackopsautoworks.com\/products\/mahle-ms-piston-bmw-s55-84mm-bore-89-6mm-stroke-144-35mm-rod-10-5cc-10-2cr-tbc-coated-set-of-6","provider":"Black Ops Auto Works","version":"1.0","type":"link"}