For anyone who has installed lowering springs on their 2012 Civic Si coupe, did you have to add the rubber piece that was on the 8th gen Si for the springs on the back of the car? I saw a DIY where the person mentioned that he had to add that rubber piece off the 8th gen. Also if you ordered the H&R springs did the rubber piece come with your order? I did a search and found nothing on this, other then the one DIY.