$155 is a bit steep for a RMM. What benefits does the COBB RMM benefit us over the 2J RMM ($59) and the Powerflex RMM ($79)?
How is it superior to the Powerflex option?
Well for starters, Powerflex is bushings only fitted in your OEM motor mount piece. The COBB part completely replaces the OEM rear motor mount.
and To be honest with you, $155 is still pretty reasonable IMO
How does it compare to the 2JR piece?
I can't tell whether or not the 2J Delrin motor mount insert includes the metal dogbone piece or not, but I can tell you a solid delrin bushing will likely be harsher.
Note the Cobb unit has holes in the larger bushing while the 2JR unit does not. Joe makes some badass stuff, don't get me wrong.
While both will help reduce wheelhop and unwanted engine movement I will bet that the 2JR piece is probably harsher driving, whereas the Cobb unit has been engineered to address the RMM's problems without making driving overly harsh. That and the Cobb piece looks slightly prettier. If I were building an all out racecar I would probably opt for the solid delrin mount but for a commuter like me, I reckon this will be the Goldilocks "Just Right" RMM for street users.
I will let you know how it behaves once I install mine.