You are buying a set of 2 automotive wheel adapters (and spacers), enough to widen one axle 4.00" total wheel to wheel at 2.00" per side (one spacer in the kit for each wheel on the axle and this comes with lug nuts). The 4.00" wheel spacers are 2.00" per side and will fit most any vehicle with an 8 x 200 wheel stud pattern with M14-1.5 studs.
These are for use on Ford F350 Super Duty Rear Dually models in the year ranges below:
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
Lifetime warranty on all our products.