New valve cover bolt assembly.  This is the bolt and grommet (seal).  This fits any of the 4 holes in either valve cover.  Bolts are sold individually, price is for 1 bolt.  View our other items for a 4-pack or 8-pack as you need.  Fits the following:

99-11 LS1/LS6/LS2/LS3/LS7 Corvette
99-02 LS1 Camaro Z28, SS
99-02 LS1 Firebird Formula, Trans Am, WS6, Firehawk
04-06 LS1/LS2 GTO

NOTE : These do not work on 97-98 motors.