Urethane and aluminum transmission and engine mount bushing. Significantly limits the movement of the block and the gearbox, but still allows some vibration dampening. With this set you increase shift precision considerably. The steering moment of the car becomes a lot more direct, especially compared to the often dried out standard rubber bushings. Urethane does not dry out so these sets last longer.
The urethane used is of a high 90 shor a rating so supports are on the hard side and mainly suitable for sporty/motorsport use.
This set is a good combination with the IRP short shifter.
