The factory power steering pump found on late model Gen III Hemi engines produces too much pressure for use with the older steering boxes on most older muscle cars & trucks. Because of that, Holley has developed these low-pressure Saginaw type II power steering pumps. They fit 2003-2008 5.7L & 2005-2010 6.1L Gen III Hemi Engines with the "Car Style" Accessory Drive and some 2009-2013 5.7L & 2011-2013 6.4L with 4.34-inch belt spacing.