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Product Description

Introducing the new Tomei Oversized Oil Pump for the Nissan RB20 / RB25 / RB26DETT engine. This Oversized Oil Pump is not only more durable and reliable over the stock pump but it has a higher flow rate as well. The Tomei Oil Pump has a flow rate of 56L @ 6,000RPM verses the stock oil pump which is 46.7L @ 6,000RPM.

Oil Pressure Reference Data

RPM	Oil pressure(kgf/cmg)
	Double spring + 2 shim (Out of the box specifications)	Double spring + 1 shim
3000	5.94	5.50
3500	6.10	5.70
4000	6.32	5.70
4500	6.50	5.90
5000	6.60	5.90
5500	6.60	6.00
6000	6.53	6.00
6500	6.20	5.80
7000	6.10	5.65
7500	6.00	5.60

Specification Comparison

	Tomei	Stock
Part #	TB203A-NS05A	-
Gear Material	SCM435	Sintered Alloy
Gear Set	3pc Gear	2pc Gear
Flow Rate	56.0L/6000rpm	46.7L/6000rpm
Outer Gear Diameter	97.5mm	81.0mm
Outer Gear Thickness	9.5mm	11.0mm
Gear Cover Thickness	7.6mm	6.9mm

Fits:

RB26DETT
RB25DE(T)
RB20DE(T)