The TOMEI EJ20/EJ25 Oversized Oil Pump has a rotor gear diameter, gear thickness, teeth design, as well as the case body all developed especially for tuned EJ20/EJ25 to be able support increased performance. The increased flow rate, flow pressure and durability are on a whole different level compared to ordinary after market pumps that replace only the internal rotor gear.
Features
- Oil Flow Rate: 49L (@ 6000rpm / pressure 530KPa)
- Material: SCM435
- Inner rotor gear: 9 teeth
- Outer rotor gear: 10 teeth
- Outer rotor gear O.D.: φ80mm
- Outer rotor gear thickness: t=13
We ship to the United States and 150 other countries.
Japan Post EMS & ePacket, FedEx, DHL and more.
Tomei was founded in 1968 by members of the Johoku Riders motorcycle club, among them Nissan works driver Seiichi Suzuki. It began as a racing engine builder for Nissan engines only, and its work on the Nissan L-series and later the RB and SR engines made its name. The company took the name Tomei Powered when it moved to Machida, Tokyo, in 1994.
Tomei now develops parts for many Japanese engines, Mitsubishi, Subaru and Toyota as well as Nissan: camshafts, valve train parts, pistons, connecting rods and crankshafts, complete engines, and exhaust systems such as its well-known Expreme titanium range.
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About NENGUN
Since the year 2000, NENGUN has supplied over 500,000 parts direct from Fukuoka, Japan to 170 countries worldwide. If you have any questions, our experienced and friendly customer service team is always happy to help, please send us an enquiry.











