Edelbrock part #4254 With Rear Mounted Cam Sensor (LS1 and Early 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. Not for use with a double roller timing chains.. Edelbrock; Edelbrock Valve Cover; Valve Cover; PCV; Breather; PCV Baffle; Baffle; Breather hole; PCV hole; 1-1/4in. diameter hole; Aluminum roller rocker; Aluminum; Stamp steel; sand cast; 4259; big-block Chevrolet Big Victor Spread-Port CNC 405 cylinder he. Edelbrock part #4254 With Rear Mounted Cam Sensor (LS1 and Early 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. Chevrolet:Small-Block Gen III LM7:325 (5.3L);Chevrolet:Small-Block Gen III LR4:293 (4.8L);Chevrolet:Small-Block Gen III LS1:346 (5.7L);Chevrolet:Small-Block Gen III LS2:364 (6.0L). Edelbrock Timing Cover 2-Piece for GM Gen 3 Ls-Series. Includes All Necessary Gaskets/Bolts/Seals. TIMING COVER 1997-04 GM LS1/LS6 TWO PIECE. Edelbrock Gen III LS1/LS6 Timing Cover. Aluminum Timing Cover. Engine Timing Cover. { eo : 0in.}. LS1/LS6 Cvr. ELITE

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