This bushing kit is a sub frame to chassis insert. Due to the heavily void rear suspension sub frame large crossmember misalignment and movement can be noticed and observed during hard constant cornering giving a sensation of the rear end squirming around.

Having the large voiding in the rear bushing also allows the rear cradle to change the suspension alignment dynamically allowing toe angel changes to the rear suspension during cornering. By installing these inserts into the void it dramatically reduces the effect of this and allows a more positive feel from the rear end during cornering. This is a very inexpensive kit that gives you a lot for your money.