These exhaust manifold gaskets are for:

Chevrolet

small block engine

AM General 
Hummer 1996 

Cadillac 
Escalade 1999-2000 

Chevrolet
C1500 1996-1999
C1500 Suburban 1996-1999
C2500 1996-2000
C2500 Suburban 1996-1999
C3500 1996-2000
Corvette 1982-1991
Express 1500 1996-2002
Express 2500 1996-2002
Express 3500 1996-2002
K1500 1996-1999
K1500 Suburban 1996-1999
K2500 1996-2000
K2500 Suburban 1996-1999
K3500 1996-2000
P30 1996-1999
Tahoe 1996-2000
W4500 Tiltmaster 1996-2000 

GMC
C1500 1996-1999
C1500 Suburban 1996-1999
C2500 1996-2000
C2500 Suburban 1996-1999
C3500 1996-2000
K1500 1996-1999
K1500 Suburban 1996-1999
K2500 1996-2000
K2500 Suburban 1996-1999
K3500 1996-2000
P3500 1996-1999
Savana 1500 1996-2002
Savana 2500 1996-2002
Savana 3500 1996-2002
W4500 Forward 1998-2000
Yukon 1996-2000 

Isuzu 
NPR 1996-2000 

Workhorse 
FasTrack FT1061 2002-2004
FasTrack FT1260 2000-2001
FasTrack FT1261 2002-2005
FasTrack FT1460 2000-2002
FasTrack FT1461 2002-2005
FasTrack FT1600 2000-2001
FasTrack FT1601 2002-2005
FasTrack FT1800 2000-2001
FasTrack FT1801 2002-2004
FasTrack FT1802 2002-2003
P30 2000-2005

These fit more models and engines than shown in the Ebay catalog system.