The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2009 | Buick | LaCrosse | Super |
| 2006-2009 | Chevrolet | Impala | SS |
| 2006-2007 | Chevrolet | Monte Carlo | SS |
| 2005-2008 | Pontiac | Grand Prix | GXP |
