These polyurethane bushings inserts are for the Revshift E9x/E8x motor mounts. The bushing inserts are for swapping in a different hardness or rebuilding your RevshiftE9x/E8x motor mounts to brand new condition.
Sold as a complete set.
80A black: Slightly stiffer and stronger than OEM rubber. No additional NVH. Great choice as an upgraded stock replacement (OEM+).
95A green: Significantly stiffer and stronger than OEM rubber. Minor increase in NVH. Excellent for enthusiastically driven street cars and track cars.
(NVH = noise, vibration, harmonics)
Learn more about choosing polyurethane here: https://revshift.com/pages/polyurethane
Please select hardness.