Cummins ISB 5.9, Valve Covers, (GOOD USED) Cummins ISB 5.9L Valve Cover 3945799 For Sale, 24 VALVE, FITS 1998 1999 2000 2001 2002 2003, Part # 3945799, ISB 5.9, 6BT, Stock # 6569 | Tested & Inspected!