The 2.5" front spacers are only recommended for 2004-2007 2wd Titans OR any Titan using high-clearance upper a-arms and stock length shocks (Bils 5100 ft shocks are longer than stock and these spacers are too thick to be used). Kit includes 2.5" lift front spacers and 1" or 1.5" lift rear blocks for a small lift all around and about 1.5" less rake than stock.