Nissan RB20, 25 & 26 engine VErnier Adjustable Cam Gears for (pair) Rollmaster ROBD9270A

Because the cam sprocket is produced in two parts it allows the outer sprocket section to move separately and independently to the inner hub by way of elongated slots, allowing infinite adjustment to cam timing. All vernier sets use our regular crank sprockets with single crank keyway only, but all have nitrated sprocket teeth on both cam and crank. Torrington one-piece thrust bearings are used exclusively on all vernier sets where applicable, otherwise brass thrust washers are fitted. Installation is a breeze with vernier sets as the entire set can be installed in just the same manner as any other timing set