I've used PST on many cars and normally go with the urethane as todays rubber seems to fail pretty quickly ( even name brand parts). If you do go with urethane buy additional qty's of the 'special" grease that you'll learn to hate as it sticks to EVERYTHING you touch and is somewhat difficult to remove from your hands. Use liberal amounts, assemble and clean off the excess. haven't had a squeaker yet in 30+ years