Metric car spherical bushing question??

[racer21]

Fixen to put rear under car and was wondering if i should use the bushings on all upper and lowers or just lowers,i have them for all arms but was wondering if they was needed in upper
and lowers,Thanks in advance

[dirtplay18]

I run a 1/2 set (4) in mine, have them in the housing end on all the arms. Run the stock rubber bushings in the front (chassis) side of all arms. Ran this way for the past 7 seasons with fantastic luck. I've heard of guys running them on both ends of the arms, but they seem to have trouble breaking the arms, because of no rubber to absorb the shock. You have to re-grease them about every 8-10 races. Well worth the $$, definantly freed up the housing movement on mine.

[setup479point2]

One of the most successful cars I've ever seen, ran them everywhere. Something like 12 features at just one track. The car I just built has them everywhere except the top of the rearend , they are stock rubber.