[mokinbird87]

Originally Posted by KoolBRZ

I was reinstalling my aftermarket header, so I already had it up in the air, with the covers off and everything. It was easy. I spent more time and effort buttering everything up with grease, than I spent actually installing them. The rears were a little bit trickier, since there are plates top and bottom, to be installed in the right order. I took a test drive last night and the whole car seems more solid, maybe even a little bit quieter. It used to shake whenever it went over a bump, now it just goes thump. I can finally tune in my suspension now that I've got rid of the looseness.
I have Airlift and I can adjust spring strength and rebound dampening. Rebound changes with spring strength, so I just set the ride height/spring strength first, then adjust dampening to suit. I also have the softer, hollow, sway bars, so there is less to control the suspension going all flubbery over bumps. I would definitely recommend these to anyone who has a 2013 or 2014 before the use of the new stepped bolts. If you have the newer design bolts installed not only won't these inserts fit, but you wouldn't feel much of a difference if they did.
The newer bolts put all the strain on the threads, while the older bolts with inserts put the strain on the surrounding holes. I haven't heard about any of the new car's frames being torn apart on the track, so I guess the newer bolts work out OK.
If you've already bought these and have put off installing them, don't, it's easy. It's only 8 bolts. I bought new bolts online, and I made sure they were the old style bolts without the wider shoulders. I would recommend using new bolts, since these could weaken over time.

glad the install was easy for you cuz for me it was a PITA