{"product_id":"arp-84-0mm-ring-compressor","title":"ARP 84.0mm Ring Compressor","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e901-8400\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036022495\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP 84.0mm Ring Compressor for BMW 1992-2006 M50 M52 M54 Engines\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe ARP 84.0mm Ring Compressor delivers precision compression for piston rings on 84mm bore pistons in BMW M50 M52 M54 inline-six engines. It works with E36 325i 328i E39 525i 528i 530i E46 323i 325i 330i for reliable engine rebuilds. Tapered steel construction compresses rings evenly to avoid damage and ensure proper cylinder seating.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact 84.0mm Sizing:\u003c\/strong\u003e Matches BMW M50 M52 M54 bores precisely for secure ring compression without gaps or slippage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered Design:\u003c\/strong\u003e Gradual slope applies even pressure to prevent ring cocking breakage or distortion during piston insertion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel Construction:\u003c\/strong\u003e High-strength material handles high-pressure assembly and repeated professional use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth Bore Surface:\u003c\/strong\u003e Polished interior avoids scratches on rings or pistons for clean reliable sealing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnurled Grip:\u003c\/strong\u003e Textured exterior provides firm hand control in tight engine bays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInspect rings and pistons for damage before compression\u003c\/li\u003e\n\u003cli\u003eLubricate rings lightly with assembly lube for smooth operation\u003c\/li\u003e\n\u003cli\u003eStore in dry area to maintain surface finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eSlide compressor over piston crown then lower to engage rings before guiding into cylinder block\u003c\/li\u003e\n\u003cli\u003eWorks with OEM and aftermarket 84mm pistons no special adapters needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1992-1995\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e325i\u003c\/td\u003e\n\u003ctd\u003eE36 M50B25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1993-1995\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e525i\u003c\/td\u003e\n\u003ctd\u003eE34 M50B25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1996-1999\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e328i\u003c\/td\u003e\n\u003ctd\u003eE36 M52B28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1997-2000\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e528i\u003c\/td\u003e\n\u003ctd\u003eE39 M52B28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999-2000\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e323i\u003c\/td\u003e\n\u003ctd\u003eE46 M52B25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000-2003\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e325i\u003c\/td\u003e\n\u003ctd\u003eE46 M54B25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000-2003\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e530i\u003c\/td\u003e\n\u003ctd\u003eE39 M54B30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2006\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e330i\u003c\/td\u003e\n\u003ctd\u003eE46 M54B30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose ARP?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eARP builds trusted components for racing and street engines worldwide\u003c\/li\u003e\n\u003cli\u003eEvery tool undergoes strict quality checks for consistent performance\u003c\/li\u003e\n\u003cli\u003eEngineering focuses on durability in demanding assembly conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will this fit BMW E46 330i M54 engines?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes the 84.0mm size matches M54B30 bore exactly for E46 330i and similar models\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material construction does it use?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Made from robust steel with knurled finish and smooth bore for long-lasting strength and grip\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What support comes with ARP tools?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Backed by ARP manufacturer defect warranty contact ARP for claims\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or USPS Priority\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Protective cardboard box 4 x 4 x 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":43758948286543,"sku":"ARP901-8400","price":68.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-84_0mm-ring-compressor-arp.jpg?v=1767415378","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-84-0mm-ring-compressor","provider":"Black Ops Auto Works","version":"1.0","type":"link"}