This Product produced by: http://www.revshift.com/
These mounts are designed for the E36 and E46 including the M3, Z3, and Z4.
Revshift polyurethane motor mounts are made in the U.S.A. from high grade polyurethane.
Revshift mounts are the most durable and reliable mounts on the market. High tensile strength flanged studs are embedded deep in the urethane which prevent the isolated ends from separating under extreme loads. Utilizing class 12.9 alloy steel fasteners these mounts will hold your engine in place for a lifetime. The class 12.9 fasteners are approximately 75 percent stronger than the fasteners used on stock automotive mounts.
Please specify the hardness.