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The 2011 Buick Regal has an inline 4 engine.
The 2011 Buick Regal has a 2.4 L base engine size.
4 inch, 4x6, and 6x9
3 1/2 inch
The 2001 Buick Regal has a V6 engine.
The 2004 Buick Regal has a V6 engine.
The 2003 Buick Regal has a V6 engine.
The 2002 Buick Regal has a V6 engine.
The 2004 Buick Regal has a 3.8 L base engine size.
The 2003 Buick Regal has a 3.8 L base engine size.
The 2012 Buick Regal has a 2.4 L base engine size.
The 2001 Buick Regal has a 3.8 L base engine size.