NISMO RB26DETT GT Engine Block “RRR” — 11000-RRR45
Historical product reference — not currently stocked. This page documents the NISMO 11000-RRR45 “RRR” engine block for enthusiast research, identification, and historical reference.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.
The 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.
Identification and application context
- Reference part number: 11000-RRR45.
- Brand: NISMO / Nissan Motorsports.
- Engine family: Nissan RB26DETT; also discussed in RB28 build references.
- Chassis context: Nissan Skyline GT-R BNR32, BCNR33, and BNR34. Installation requirements depend on the complete engine configuration and associated components.
- Common identification: the raised “RRR” casting mark. Casting marks should be considered alongside part-number documentation and provenance when identifying a particular block.
Motorsport heritage
Historical 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.
Reported engineering characteristics
Specialist 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.
RRR 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.
11000-RRR45 component reference sheet
The 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 11560-05U10.
The 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.
Research and restoration uses
A 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.
Availability: reference-only listing. No physical block or hardware is being represented as available from NizmoPartsPlug through this description.
NISMO RB26DETT GT Engine Block “RRR” — 11000-RRR45
Historical product reference — not currently stocked. 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.
The 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.
Identification and application context
- Reference part number: 11000-RRR45.
- Brand: NISMO / Nissan Motorsports.
- Engine family: Nissan RB26DETT; also discussed in RB28 build references.
- Chassis context: Nissan Skyline GT-R BNR32, BCNR33, and BNR34. Installation requirements depend on the complete engine configuration and associated components.
- Common identification: the raised “RRR” casting mark. Casting marks should be considered alongside part-number documentation and provenance when identifying a particular block.
Motorsport heritage
Historical 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.
Reported engineering characteristics
Specialist 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.
RRR 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.
11000-RRR45 component reference sheet
The 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 11560-05U10.
The 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.
Research and restoration uses
A 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.
Availability: reference-only listing. No physical block or hardware is being represented as available from NizmoPartsPlug through this description.
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Customer Reviews
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Item as described. super fast shipping. I highly recommend this item so that shifter gap no longer exists.
Always come in clutch! NPP for your Nissan and Nismo Parts
Hallo hier ist Nick aus Deutschland,
danke für den super schnellen Versand und den klasse Service.
Kann man nur weiterempfehlen.
Lg Nick
Thank you so much. For a girl like me not actually knowing wtf it’s amazing to have someone to have my back when getting parts so I seriously appreciate this avenue of obtaining parts for the car. It’s like you know unlike others when you go to a random store. #skylinelifestyle lol
Dylan worked with my mechanic to help me get a brand new transmission for my car and it needed a lot of extras and he helped my mechanic find what they needed to get the job done. It was awesome. Anytime I need to get a part I just ask him and he’s super helpful. I trust that I’m getting the right part for me car. Thanks a ton.
Dylan and his team are amazing! Always answer all my annoying questions in a fast and accurate manner. Part quality is amazing and shipping happened faster than expected. Will always shop here first!!
The dedication and commitment that NPP provides to customer service is truly unparalleled. Every interaction reflects a genuine willingness to help, and it’s clear that NPP is both highly knowledgeable and passionate about what he does.
I’ve purchased various Nissan parts from NPP, and each one has been of top-notch quality — exactly as described and perfectly suited to my vehicle. The attention to detail, reliability, and professionalism make NPP my go-to source for all things Nissan.
Highly recommended for anyone looking for quality parts and outstanding service!
Dylan is very knowledgeable on all Nissan parts and will take the time to explain and help customers get the right products. Quick response to questions and extremely fast shipping and processing times. The best to go to for all nissan and nismo parts!
