English Racing Underdrive Oil Pump Gear for 4G63/4G64 (OP-GEAR) *Backorder*

The English Racing 4G63/4G64 Underdrive Oil Pump Gear has a larger overall diameter to lower the very high oil pressures the DSM & Evo engines reach and allows more oil to be in the pan where it should be to protect the engine!

*Backorder* ETA unknown
As of Feb 2024, this part is currently on backorder from English Racing with no ETA at this time. We will fill all backorders first when they do arrive, so get your order in if you need one!

Vehicle Fitment:
Mitsubishi 4G63
1992-2006 Evolution I-IX
1990-1999 Eclipse GST/GSX
1990-1998 Talon TSi
1990-1994 Laser RS
1991-1992 Galant VR4

Features:
• Fits all 4G63/4G64 (DSM & Evo 1-9)
• Must have Balance Shaft Deleted
• Oil Pump Front Cover Requires Light Modification (Can be done in car)
• Retards Cam Timing (about 2 Degrees)

Discounts:
We are sorry, discount codes are not available with this product.


Team English Racing FAQ:

Q. Timing belt?

A. Same as stock. Just reset the idler on the tensioner. requires minor trimming of the pump and cover to fit. Not big deal for the engines these are made for!


Q. How much does it drop oil pressure?

A. 1100rpm idle is 20psi, the pump doesn't exceed 90psi even with rolled bearings (deleted shaft). Cars that have a balance shaft delete but retain the shaft will be in the 80psi range which fits the old 10psi per 1000rpm rule even better.


Q. Why?

A. Reduced load on the oil pump will mean reduced failures of both pumps and engines.