4、6Lug Wheel Spacers:4PCS 6061-T6 aircraft-grade aluminum billet 6×4.5 spacers, with 24PCS 10.9 grade bolts, wheel spacer adapters not easy to break/crack, ensure your driving safe and comfortable. 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Xterra.