So I've quite a bit of research on anti-pogo washers and I understand they are a must when lowering the ride BUT what I want to know is, are they an upgrade with stock struts and springs? Some posts say it's pointless, it's not needed but some posts say it's a must on stockers too. Has anyone used anti-pogo washer on a stock set-up? I would like a definitive answer please.
I saw this on Will's site and I don't know if it's outdated or something I should follow.
Upper Strut Retainers
Commonly referred to as "anti-pogo retainers" on the forums, these are not just for lowering springs, THIS IS A MOD THAT EVERYONE SHOULD DO. How it works is the front upper strut mounts are a floating design, you can see the gap between the rubber mount and the metal retainer if you pop your hood. It allows the mount to have play before the strut shaft reacts to movements from the spring. The top retainer can be replaced with GM p/n 10203412, a similar size retainer from the subframe with a shallow cup, you'll need two. Installed, that gap between the rubber on the mount will be completely taken up, and the strut will now react to any spring movement. With the car on the ground, use an air or electric impact gun to loosen the upper shaft nut, re&re the retainers and reinstall the nut. This is a $25 and takes a few minutes with the right tools.
