ARP 100-7532 Valve Cover Bolt Kit 2001-2004 GM 6.6L Duramax LB7ARP 100 7532 Valve Cover Bolt Kit 2001 2004 GM 6. 6L Duramax LB7 Hex head valve cover bolt kit for Duramax 6. 6L LB7 engines, designed for secure sealing and repeated service. Hex head hardware for easier service access Helps maintain consistent valve cover clamping Includes required washers (where applicable) Built for durability in heat cycle conditions Fits: GM: Silverado 2500HD; Silverado 3500; Sierra 2500HD; Sierra 3500 Applications: Make Model