he every one i helped a friend who is a mazda teck. to install a mazda speed rear sway bar on his 2010 van we had to make two shims to move the urethane bushings 1 1/4 inch out board . this lines up bushings with mounting brackets because the 2010 has wider mounting brackets we allso drilled out the sway bar holes to use mazda speed end links . we had every thing ready to go and had the old bar out and the new bar in in 30 mins the sway bar. fit great allso the red bar looked real sweet on the van ... now it was time to test out the bigger rear sway bar .. what a differnts it made . it handles 50 times better than the stock sway bar we both drove the van and we both feal it does not need a mazda speed frount sway bar for my friend van he uses it as a daily driver not a race car lol the new rear bar helps the van from swaying in the wind we had a good test we had 40 MPH head winds the other day and the van worked great no sway at all in the wind the van went straight down the road at 60 mph like the wind was not there i am going to put a rear sway bar on my mazda 5 this summer spencerfvee