Edelbrock Aluminum 2pce Timing Cover Chev Holden LS2 6.0L Engines # ED4255 Cylinder Head Unilite Spark Unilite Spark The aerodynamically designed chambers flow 23 percent better and produce more horsepower and torque than the most popular high performance brand Edelbrock part #4255 With Front Mounted Cam Sensor w hole (LS2 and Later Model Trucks) These two piece aluminum timing covers for GM Gen III IV LS Series allow quick camshaft removal and installation without the need to remove the damper pulley or steering components The cam can be installed and removed through a window in the front of the cover which is sealed with a plate and O ring for superior leak prevention