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The MEM10295 provides users of stock crankshaft short blocks a quality replacement for the original stock LS1 oil pump. The inlet and outlet passages have been optimised to improve oil flow entering and exiting the pump which improves overall pump performance. The design of the pressure relief has been updated to improve low RPM performance. The pressure by-pass setting has been increased 10 psi with the installed spring. An additional pressure relief spring is supplied which will reduce the by-pass back to the stock setting. The pump cover is CNC machined from cast iron and coated to improve performance and durability. The oil pump housing is CNC machined from cast aluminium and hard-coat anodised to increase hardness and improve durability.