We now stock this high pressure oil pump PRV spring kit for the Cosworth YB oil pump (2WD and 4WD). It is aimed at customers who want to increase the oil pressure in their engine without replacing the oil pump.
This kit contains a high quality PRV spring from Cosworth along with a replacement OEM core plug (as the original core plug will be damaged when it is removed).
Fitting this PRV spring should raise the oil pressure in the engine to around 4.8 bar.
(You can find more details about the YB oil pump design in our technical section.)