{"product_id":"arp-81-5mm-ring-compressor","title":"ARP 81.5mm Ring Compressor","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e901-8150\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036022327\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP 81.5mm Ring Compressor for VW\/Audi 1.8T, Honda B18, BMW M42\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eARP 81.5mm Ring Compressor (901-8150) simplifies piston installation in performance engines with 81.5mm pistons including VW\/Audi 1.8T, Honda B18, and BMW M42 builds. This precision tool delivers even clamping force to slide pistons into cylinders without ring damage or wall scoring. Built for consistent results in street and race engine assemblies.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Tapered Profile:\u003c\/strong\u003e Gradually squeezes rings evenly to avoid distortion or breakage during piston insertion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnurled Grip Surface:\u003c\/strong\u003e Provides firm hold in oily conditions for controlled placement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact 81.5mm Fit:\u003c\/strong\u003e Matches oversized pistons in popular 81mm bore engines for seamless compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6061-T6 Aluminum Build:\u003c\/strong\u003e Lightweight yet tough construction handles repeated professional use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARP Engineering:\u003c\/strong\u003e Application-matched design ensures reliable clamp load every time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm piston OD measures 81.5mm prior to use\u003c\/li\u003e\n\u003cli\u003eLubricate rings lightly for optimal compression\u003c\/li\u003e\n\u003cli\u003eStore in dry area to maintain taper accuracy\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 rings and taper into cylinder bore\u003c\/li\u003e\n\u003cli\u003eUse ARP-recommended lubes on threads and rings if applicable\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\u003e1996-2006\u003c\/td\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eA4\u003c\/td\u003e\n\u003ctd\u003e1.8T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1998-2005\u003c\/td\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eA6\u003c\/td\u003e\n\u003ctd\u003e1.8T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999-2006\u003c\/td\u003e\n\u003ctd\u003eVolkswagen\u003c\/td\u003e\n\u003ctd\u003eGolf\u003c\/td\u003e\n\u003ctd\u003eGTI 1.8T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999-2005\u003c\/td\u003e\n\u003ctd\u003eVolkswagen\u003c\/td\u003e\n\u003ctd\u003eJetta\u003c\/td\u003e\n\u003ctd\u003eGLI 1.8T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1994-2001\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eIntegra\u003c\/td\u003e\n\u003ctd\u003eGSR \/ Type R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1992-1999\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3 Series\u003c\/td\u003e\n\u003ctd\u003e318i \/ 318is M42\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\u003eTrusted brand in performance engine components for decades\u003c\/li\u003e\n\u003cli\u003eReliable tools match fastener quality standards\u003c\/li\u003e\n\u003cli\u003ePrecision machined for pro-level engine work\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 Which piston sizes does it support?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Specifically for 81.5mm diameter pistons common in rebuilt VW\/Audi 1.8T, Honda B18, BMW M42 engines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the construction material?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Machined 6061-T6 aluminum with knurled finish for strength and secure grip.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What support does ARP provide?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e ARP backs tools with satisfaction guarantee, contact for warranty 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 \/ USPS\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 5.8 x 5.3 x 1.2 inches box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.8 oz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":43739367669839,"sku":"ARP901-8150","price":68.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-81_5mm-ring-compressor-arp.jpg?v=1768371001","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-81-5mm-ring-compressor","provider":"Black Ops Auto Works","version":"1.0","type":"link"}