How difficult are these to install?
Honestly don't know.
Might get a better answer at ecotecforum.com
www.kronosperformance.com / 732-742-8837
The bolts in the back / top one are kind of a pain to get to. Have a lot of extensions on hand and a universal.
Not too hard I used the cavy bushings but the bolts thru the sleeves are larger so i had to drill the sleeves out no big deal..Then you need to bend the 4 tabs that hold the old rubber bushings in and use a vice to push the new ones in....front and rear with another guy 2 hours tops...and you can notice the difference when you hit 2nd...check my cardomain....ECOTEC922
They are easy to install. Remove the mount, bend the three tabs back and hit old ones out. They come out rather easily, at least mine did. Anyways, if you purchase these, read which mount is which. There is a front and back one, i made the mistake of installing the wrong one in the wrong spot and having to hack saw the sleeve to fit properly.