On a well-built engine is not uncommon to have too much oil pressure. We use this adjustable relief valve to set oil pressure at 80 pounds. Adjustment is made by simply turning a knob. Made of stainless steel and includes spring.
Assembly with a little thread sealer to reduce the tendency to weep oil.
Note: We have fitted many of these in our shop It features a nice integral textured knob on the large diameter adjustment plunger, not a “grille button” glued on a small shaft. The jam nut prevents movement from engine vibration. A superior product!