The Prothane rear subframe mount insert for 1966–1982 BMW applications is a black polyurethane replacement bushing that reinforces rear subframe mounting points. Intended for use where original rubber inserts have deteriorated, it provides firmer support and helps reduce movement in the rear subframe during restoration or performance-oriented rebuilds of compatible BMW models.
Prothane 66-82 BMW Rear Subframe Mount Insert - Black