When using the Nissan RB Series engines in racing or increased HP applications lubrication suffers.  The factory oil pump struggles to maintain oil pressure which often results in bearing failure particularly in high rpm and high output engines. 

The Genuine Nissan N1 GTR RB26DETT Oil Pump is a direct bolt-up to Late R32 GTR and all R33-R34 GTRs.

For the following engines the collar below will be required to fit the N1 oil pump over the crankshaft:

• Early R32 RB26DETT engines
• RB20DE
• RB20DET
• RB25DE
• RB25DET
• RB30E
• RB30ET