- More response to the driver- Less Rear Wheel Hop- Improve traction- Maintains excellent hardness in bushing without the noise produced from road and differentials that aluminum bushings cannot suppress- Package comes with 4 bushings with harden rubbers- 150% Harder that stock bushings- Made with high-strength and anti-craking rubber material- Rubber viscosity at approxmite 2000KGS-Installation Level:AdvancedNOTE: Will require a PRESS to install on to the sub frame.