with the ggr oil pump heres some info on it
will it be any good
Genuine Subaru Impreza oil pump which has been modified by our GGR fully trained motorsport techinicians.Subaru Impreza engine failures are often caused by poor lubrication, and it is our opinion that the oil pump design is a possible cause. I.E. The pressure releif valve sticking. It is also regarded as a must have modification enhancement with any Impreza rebuild or just peace of mind.This oil pump incorporates a number of subtle modifications, solving these problems.We use a Brand New Genuine Subaru oil pump and our in-house GGR Motorsport Technicians fit an improved pressure relief valve