Review on ACDelco 45K8081 Professional Rear Spring by Brandon Hayes

This is what I was looking for - verified part number on the AC Delco website. The springs are ok - they're stiffer, which makes the ride a bit stiffer, but improves handling and loads more. They have slightly thicker spools and one more spool than the standard spools. The ride height was increased slightly, the pre-install spring height was 3/8" higher than stock. They match Delco AC #458075 for the rear. At first I only tried the rear ones, but the ride was unbalanced until I got them installed.