Edelbrock Aluminum 2pce Timing Cover Chev Holden LS2 6.0L Engines # ED4255 Cylinder Head The aerodynamically designed chambers flow The aerodynamically designed chambers flow 23 percent better and produce more horsepower and torque than the most popular high performance brand Turbo 400 TH400 TCI Speedometer Gear Housing 40 45T # TCI880043A Not for use with a double roller timing chains 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