Supercharger Blower Manifold is a direct fit for the following:

1997-2004 Buick Century
1996-2005 Buick Park Avenue
1997-2004 Buick Regal
1996-1999 Buick Riviera
2004-2005 Chevrolet Impala
2004-2005 Chevrolet Monte Carlo
1996-1999 Oldsmobile 88
1996-2003 Pontiac Bonneville
1997-2004 Pontiac Grand Prix