Tunable Mount Replacement Bushings

Product Details

Keep your Rennline Tunable Engine or Transmission Mount performing at its best with a fresh set of replacement polyurethane bushings. Available in three durometer ratings, these bushings let you tune your mount's characteristics to match the way you drive, from a street-comfortable 65A to a race-focused 85A. Replacing worn bushings restores the mount's ability to reduce engine movement, improving acceleration response, handling, and shifter feel.

See fitment guide for compatibility.

Fitment Guide

Notes

• Available in three durometer ratings: 65A Street (Soft), 75A Track (Medium), 85A Race (Hard)
• Polyurethane construction
• Proposition 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov

FAQ

Q: Which durometer should I choose?

A: The 65A (Soft) is best suited for street use, providing a compliant feel close to factory while still reducing unwanted engine movement. The 75A (Medium) is a popular choice for track days and spirited street driving, balancing performance and comfort. The 85A (Hard) is intended for dedicated race use where maximum engine stability and drivetrain response are the priority.

Q: Are these compatible with my Rennline mount?

A: These bushings are compatible with all Rennline Tunable Engine and Transmission Mounts, including the M21 (991/981/718) and M18 (964/993/996/997/986/987).

Q: How do I know when my bushings need to be replaced?

A: Common signs of worn bushings include increased engine movement under acceleration, degraded shifter feel, or visible cracking and deformation of the bushing material. Regular inspection is recommended, especially on vehicles used for track events.