Silicone grease is safest for urethane. Avail at Home Depot, the big "DEPOT"
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Sinister Stang 1965 CP 302, E2 Body Kit, Paxton SC, TCP Front & Rear Coilover, TCP Power Rack, GT40 Wheels w/Nitto NT01's, 457 rwhp @ 5 lbs of boost
Mustang Depot