During acceleration and speed change, forces are released that cause the engine to tilt. In order to minimize this inclination, the engine mounts are equipped with rubbers. The hardness of the rubber is composed in the factory for maximum comfort.
If a performance motor is mounted, this can cause problems, the original rubber is too soft and the motor tilts more than desired. In extreme situations, the engine can even tip over until it spontaneously jumps off speed by accelerating or changing gears.
These urethane rubbers are much stiffer than the original, which means that the gearbox and therefore the engine are mounted more firmly on the chassis. This limits the inclination of the engine but also costs in comfort, the vibrations of the engine are much better transmitted.
These rubbers do not have a metal support, which is the case with the stronger version (see under the alternatives tab). If you mount these rubbers on performance engines, they will tear faster than on an engine with less power or standard. We therefore recommend that these rubbers be mounted only on standard or slightly modified motors.
The rubbers are mounted with bolt and nut. In order to limit tearing, metal bushings pass through the urethane. Use only the supplied mounting material, only in this way can you be sure of correct mounting and maximum service life.
For the Volkswagen Beetle and Karmann Ghia from 8.1972 to 12.1985, it is not possible to mount the front rubber, but there is an alternative in urethane, the so-called conversion adapter mentioned under the alternative tabs. The rear rubbers can be mounted for these years provided that the gearbox suspension bracket is also replaced by the model until 7.1972 (also mentioned under the related parts tab).
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