|
FWIW I haven't ran any of the Poly engine mounts myself, but I'm friends with the owner of a local BMW-specific shop that does a lot of track builds (and re-builds!) of all sorts of BMWs and has serviced a large amount of N54 powered cars and he said that he doesn't think any of the poly mount options for the N54 are worth it.
I know the revshift are pretty new and I don't know for sure if he's installed them but his opinion is that for track-only go solid mounts (with stiff poly being okay for a 1/4 mile dedicated car) and for anything street driven you're better off with the 335is mounts or a stiff rubber option like rogue engineering. Apparently they see a large amount of catastrophic failures with poly on street cars, whether that's due to the high heat levels the N54 produces (which explains the blanket that revshift ships with) or something else I don't know for sure but I'll be steering clear personally.
|