When I decided to rebuild the RB25, I wanted to make it “new”. I also wanted to upgrade to be strong and I wanted to address any common issues. 

When it was discussed about horsepower and other factors, I am always reminded that I am not building for anything specific and I really don’t need to be chasing numbers. I do want to make a strong engine.

Echoing what Marco said, “No cheap ebay parts”, really let me focus on a few things. 

I want to use recognized Japanese companies. It is hard to not recognize the newer technology that improves the RB’s capabilities. Australia and New Zealand have been so much research into the RBs for the last 10-15 years and have improved upon Japan’s tuning. 

Here is the current list of parts I am using for the RB25det:

• RB25det rebuilt block – honed, new plugs, tested….
• CP pistons with rings and wrist pin kit (86.5mm +0.5mm 14.7 cc 9.0:1)
• ACL Bearings – rod 6B2960H-STD
• ACL Bearings – main 7M2394H-STD
• ARP main studs – 202-5403
• ARP head studs – 202-4301
• Cometic MLS head gasket – IR511060AFM
• Tomei exhaust manifold gaskets – TA4060-NS06A
• RB25det head – checked and serviced.
• Tomei valve springs (B type)
• Tomei valve guide set – TA309A-NS06A
• Tomei Poncams (update 6/2021) – TA301B-NS06A
• Franklin Engineering head drain kit with hose
• Oil pan with welded bung
• Franklin Engineering Billet alloy Cam covers seals
• Tomei oil restrictor
• RB25det crank cleaned/checked
  Nitto extended crank collar
• RB25det transmission (purchased)
• RB25det transmission rebuild kit (not installeNissan thrust bearing (need to order)
• Transmission is a PUSH RB25DET (bulkier than RB20’s).
• Nismo Pressure plate – 30210-RS245
• Nismo lightened Flywheel – 12310-RSR21
• Z1 clutch (240mm) –
• Custom transmission bracket
• ARP Pressure Plate bolts kit – 102-2201
• ARP Fly Wheel bolts kit – 102-2801
• Pilot bushing  – 32202-B950A
• RB25det Clutch Slave Cylinder – 30620-21U23
• Slave cylinder bolts – 08121-02528
• Clutch fork – 30531-CD000
• Throw out bearing retainer clip – 30514-CD000
• Clutch fork retainer spring – 30534-66300
• Clutch fork dust boot – 30542-12U00
• Koyo throw out bearing –  30502-21000
• Clutch release bearing sleeve – 30501-S0284
• RB25det engine to transmission plate 30411-21U00
• National HB6 – carrier bearing – 3752141L25
• Greddy Intake manifold – 13522316
• Greddy throttle body adapter
• RB25det Throttle body (replace Q45)
• Boost Doc Upper radiator hose insert (for Greddy intake manifold)
• Boost Doc water inlet upgrade
• RB25det TPS
• RB25det exhaust manifold (cleaned up and ceramic heat coated with Chrome X finish)
• RB25det exhaust manifold heat shield and turbo shield (cleaned up and ceramic heat coated with chrome x finish)
• New OEM timing belt and idler tensioners
• ARP timing and idle tension bolt set
• N1 Water pump
• N1 oil pump
• Tomei timing belt
• Nismo thermostat
• RB25det Rear main seal (OEM Nissan)
• Nubis Exhaust manifold studs (raw brokerage)
• Nubis Rear main seal bolt kit (raw brokerage)
• Nubis oil pan bolt kit (raw brokerage)
• Nubis Water pump bolts
• Kudos Motorsports cam timing back plate kit 
• Z1 Motorsports RB25det lower timing cover bolts 
• ZSpec – RB timing cover and coil pack fastener set 
• Phase2 clear cover
• Radium Fuel rail (top feed)
• Radium Fuel dampener
• Bosch 1000cc injectors
• Tomei Fuel pressure regulator Type S
• Tomei Fuel pressure regulator adapter (not used)
• Tomei Arms Turbo MX8562
• Syko Performance elbow
• OEM engine mounts
• Trust Downpipe
• Grex Oil filter relocation kit (on order)
• Trust Oil cooler
• PRP RB billet LS1 alternator bracket kit with pulley
• Ultima LS v8 alternator – N112017A (140 amp)
• Alternator plug (for to alternator)
• PRP R35 coil pack kit (bracket, Hitachi VR38 coil packs and Wiring Specialties harness)
• Wiring Specialties grounding kit
• ATI damper for RB25det – DPR-RB25-R33
• Ultra Heaven Koyorad S13 v8 mounting bracket (order)
• Koyorad S13 LS V8 radiator
• Wiring Specialties RB25det Pro harness (for Link ECU)
• Dakota Digital – SGI 5C
• Chase Bays – power steering kit (with reservior and cooler) – need to reorder
• GKTech – ABS delete kit 
• Optima battery – yellow top 
• Battery relocation kit (piecing together)
• Rebuilt Power steering rack
• Energy Suspension steering rack bushing
• Streetrays alumium steering shaft bushing
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