These mounts are designed for a 1983-1991 E30 BMW 3-series with a 24 valve M50/M52/S50/S52 engine swap with an E21 brake booster. They use the oem motor mount bolt holes on the E30 subframe. The mounts are angled with offset bolts to position the engine so that proper drivetrain alignment is maintained. They are used with E36 engine brackets.

Durometer Guide -

80A-  Slightly stiffer than stock but still an OEM feel. Good for daily driven cars, and HPDE cars that are dual use. 

95A- Stiffer than OEM, but still usable on the street for a die hard enthusiast looking for less driveline movement on spirited driving or track day use, great for track use on dual purpose cars, and dedicated track cars. 

75D- STIFF!  These are as close to solid delrin as you can get and still be considered polyurethane. We would not recommend these for a daily driven car. Great for dedicated track cars and our preferred mount set for any and all race cars. Slight vibration but due to the design and material they transmit far less harmonic vibration!  

*We do not recommend mixing durometer or material in the engine and transmission mount locations. 

We like these so much we will ship them to you FREE!!!!!!!