| There are a few options for the transmission mounts. I've got a 5 spd and decided to go with the OEM transmission mount for the auto transmission as I was told (I believe by bernie) that it was slightly stiffer than the one for the manual transmission but dimensionally the same. The nismo one that is offered by some is supposedly stiffer than the auto mount, but it's actually a part from the 240 and not the 300ZX. Searching will find results showing some question as to whether or not it causes some misalignment of the transmission. Though there are many comments on it working just fine. The poly one which was offered by SPL seems to have gone AWOL as I don't see it on their site anymore. It eliminated the exhaust hangers and caused a lot of noise to transfer to the cab.
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