A polyurethane insert fits into these voids in the original mount. For all 986/987 up to 2009 with engine codes M9625, M9626, M9720, M9721 & M9722. For a complete bush please use PFR57-520BLK...
This part is designed to fit into the original voided rubber mount which degrades and softens over time, allowing for excessive movement of the engine and premature failure.
