Our solid subframe bushings were designed to eliminate subframe movement that is caused by stock rubber factory bushings. Being made from high grade delrin and aluminum they are designed to be used on cars that are driven on the street and track. Our delrin/aluminum subframe bushings have the same performance as one piece solid aluminum bushings while not adding any extra vibration or cabin noise during your day to day driving. Developed in house and tested on our street and track cars. 100% precise fitment is guaranteed.