Well, on this 2007 Trailblazer with 160,000 miles, the front has asked for help! So I saw this as a great opportunity to raise it 2 inches! With those lifters, new Moog shocks, new Moog front bearings, and various other Moog parts, this Trailblazer sits high and handles well. One more thing, I'm 74 years old, not a professional mechanic and did all the work myself! Not bad, right?