Genuine Nissan RB20 RB25 RB26 RB30 Lower Inner Timing Belt Guide Plate - 13022-05U10
This plate goes between the timing gear and oil pump (rear), commonly installed backwards damaging the plate and timing belt.
Hard to find parts at a reasonable price. Parts were shipped the next day and arrived as promised. I like dealing with a company directly rather then through E-Bay and Boost Factory delivered with no problems.