The HPH oil pump drive collar is suitable for all Nissan RB engine cranks. Especially The R32 GTRs RB26 DETT, all RB20 DET, RB25 DET,RB30 ET and RB30 E. The reason is that these cranks were manufactured from nissan with a narrow oil pump drive that did not fully engage the oil pump which has caused premature wear or breakage of the oil pump and has lead to many engine failures.
Anyone with one of these engines who is going through a rebuild stage should purchase one of these oil pump drives or crank collar as many people call it for added security and full engagement of the oil pump. Nissan did rectify this issue from the R33 RB26DETT and onwards but this collar can still be used on the later engines if the existing collar is showing signs of wear.
All oil pump drives are CNC machined from 4340 chrome moly, come with detailed instructions, fasteners and 3D images for your machinist to fit to the crank. Note that this can not be done with the crank still fitted to engine.
Please contact us if you require the collar supplied and also fitted to your crank.