I see a lot of kits come with Urethan joints. Are there also rubber substitutes? I believe they take a good bit a vibration out. What is the benefit of the Urethan.

• Which SKU is needed to compliment this kit if we want four front shocks? general
• Do you sell the rear shocks? I see the separate spring kit but no shocks with it. Thanks general
• Is this Bilstein kit available in a quad shock arrangement? If so, what other part numbers would be needed? Thank you general