{"product_id":"nismo-rb26dett-gt-engine-block-rrr-11000-rrr45","title":"NISMO RB26DETT GT Engine Block “RRR” — 11000-RRR45","description":"\u003ch2\u003eNISMO RB26DETT GT Engine Block “RRR” — 11000-RRR45\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHistorical product reference — not currently stocked.\u003c\/strong\u003e This page documents the NISMO 11000-RRR45 “RRR” engine block for enthusiast research, identification, and historical reference. NizmoPartsPlug does not currently own or stock this item. Technical and historical information is compiled from reference material; reported specifications are not a guarantee of suitability for an individual block.\u003c\/p\u003e\u003cp\u003eThe NISMO 11000-RRR45, commonly referred to as the “RRR” or GT block, is a specialist RB26 engine-block reference associated with Nissan Skyline GT-R motorsport and high-performance RB builds. Its appeal extends beyond performance applications to collectors, restoration specialists, and enthusiasts researching the development of the RB26DETT and RB28DETT.\u003c\/p\u003e\u003ch3\u003eIdentification and application context\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference part number:\u003c\/strong\u003e 11000-RRR45.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NISMO \/ Nissan Motorsports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine family:\u003c\/strong\u003e Nissan RB26DETT; also discussed in RB28 build references.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis context:\u003c\/strong\u003e Nissan Skyline GT-R BNR32, BCNR33, and BNR34. Installation requirements depend on the complete engine configuration and associated components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon identification:\u003c\/strong\u003e the raised “RRR” casting mark. Casting marks should be considered alongside part-number documentation and provenance when identifying a particular block.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMotorsport heritage\u003c\/h3\u003e\u003cp\u003eHistorical accounts associate the RRR block family with NISMO and Nissan Kohki \/ REINIK competition development, including JGTC GT500 and endurance-racing applications. It is also widely associated in enthusiast and specialist references with the RB28DETT engine program used in the NISMO Skyline GT-R Z-tune. These associations provide historical context, but do not establish that an individual block was used in a race car or supplied for a Z-tune build.\u003c\/p\u003e\u003ch3\u003eReported engineering characteristics\u003c\/h3\u003e\u003cp\u003eSpecialist descriptions attribute the RRR block’s appeal to reinforced cast-iron construction, increased cylinder-wall support, and strengthened lower-block structure compared with conventional RB26 castings. Reports also describe a specialized alloy composition and changes intended to support demanding high-load use. Exact metallurgy, wall dimensions, water-jacket geometry, and structural differences should be checked against original technical documentation rather than treated as measured specifications for every example.\u003c\/p\u003e\u003cp\u003eRRR blocks are frequently discussed in connection with enlarged-bore RB28 builds. Bore figures around 87.5–88.0 mm and a 77.7 mm-stroke crankshaft appear in the supplied research, but these are reference build figures, not a blanket safe-machining limit. Final bore size, wall integrity, clearances, and component compatibility require assessment of the individual casting by an experienced RB engine machinist.\u003c\/p\u003e\u003ch3\u003e11000-RRR45 component reference sheet\u003c\/h3\u003e\u003cp\u003eThe supplied reference sheet is headed “11000 RRR45 構成部品 LIST” and illustrates associated hardware and installation locations. Listed components include cylinder-head dowels, main-gallery plugs, tensioner and oil-cooler-bracket studs, an oil-level-gauge guide, block-to-transmission locating hardware, water and oil-filter connections, and six oil jets identified as \u003cstrong\u003e11560-05U10\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe sheet distinguishes installed components from separately supplied components. It is a reference to the documented package, not a statement that loose hardware accompanies any particular block offered elsewhere.\u003c\/p\u003e\u003ch3\u003eResearch and restoration uses\u003c\/h3\u003e\u003cp\u003eA useful reference for period-correct Skyline GT-R restoration, NISMO and JGTC history research, Z-tune-inspired projects, and specialist RB26 \/ RB28 engine planning. An RRR casting alone does not make an engine or vehicle an authentic Z-tune or GT500 assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailability:\u003c\/strong\u003e reference-only listing. No physical block or hardware is being represented as available from NizmoPartsPlug through this description.\u003c\/p\u003e","brand":"NizmoPartsPlug","offers":[{"title":"Default Title","offer_id":50313268855061,"sku":"11000-RRR45","price":10000.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0136\/3850\/0452\/files\/1792810989556.jpg?v=1792811019","url":"https:\/\/nizmopartsplug.com\/products\/nismo-rb26dett-gt-engine-block-rrr-11000-rrr45","provider":"NizmoPartsPlug","version":"1.0","type":"link"}