Put these on my 2012 SRT8. Install wasn't difficult, however it did require an extra set of hands to help align everything back up on reassembly.
These springs work PERFECT. Every Challenger and Charger should come from the factory with them. It lowered the car .75 inches front and rear. More importantly it kept a .75 rake, which is important to these cars. It also made the car ride more "solid". It took out a lot of the floatiness.
This is the best mod for the money yet! If you are in doubt, don't be. Buy them now.Rating: [5 of 5 Stars!]