When your Subaru is on the corner, oil in the oil pan could lean on a side. Therefore, a baffle plate should be mounted in the oil pan. If oil flows to one side (hard cornering), air goes into the sump pipe instead of oil and brakes oil lubrication. Our baffle plate is made to achieve stable oil lubrication at any situations such as curving, acceleration or decceleration. Improves engine performance from drag to raceway or rallying.