I installed JHR in my buddies V6...it was a bit of a pain but I found it improved my shifting a lot (yeah, I was surprised) but,a good bit more NVH. My hints are make sure to disconnect the battery and on the V6 (prob V8) I couldn't jack the motor high enough to clear the OEM mount studs and took off the aluminum brackets that go between the motor and mounts instead. Next time I would cut the OEM mounting studs which would make the job alot simplier. This really was one of the better mods for me.
2012 V6 traded in for a 2017 VW GTI.