This is a set of hardware found on your M30 Rocker shafts. One set does one cylinder head. When rebuilding an engine we like to replace all associated hardware.
Includes the following:
-x12 Rocker Washer
-x12 Thrust Ring
-x12 Snap Ring
*To hold the rocker in place you will need either the stock retention springs (optional, listed above) OR our rocker arm locks (linked item listing below).