These LS1 Performance Multilayer Gasket for engines, can also be used with All engines including 4.8, 5.3, 5.7 blocks. These are possibly The best gaskets for engines up to 3.920 inch bore. These gaskets are the preferred gasket for Turbo, Nitrous, Heads/Cam applications due to there superior strength. This is a DIRECT REPLACEMENT for the LS1/LS6 gaskets. 3.920 inch bore, 0.051 inch compressed thickness that can be used on 4.8, 5.3, and LS1 engines. Type: Gasket Kit Condition: New ManufacturerPart Number: 12589226 Fitment Type: Direct Replacement Fitments: for Brian Tooley Racing, , , 5.7L, 5.3L, LM7, L59, LM4, L33, , -v, 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Material:Metal colour:Photo Color Package Contents: 1 Pair * Cylinder Gaskets Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.