On higher horsepower performance engines, the stock
motor mounts tend to break under repeated full load conditions.
Whether you're looking to replace broken motor mounts or protect
against them, our urethane motor mounts are an excellent solution.
In addition to reliability over the stock mounts, you will discover
an improvement in throttle response. Urethane motor mounts are available
for 2nd and 3rd Generation RX-7's.
< FD 3rd Gen Urethane
$340 a set w/ core
$150 core fee refundable upon receipt
of old cores. Subject to availability of cores in stock.
Our popular 3rd Generation RX-7 urethane motor
mounts are reconditioned from stock motor mount cores. Each
core is then specially fitted with a urethane bushing and
a special urethane disc which reduces transferred vibration
without sacrificing strength. These are recommended for high
performance engines and/or repeated full load conditions.
there excessive increase in vibration with the stronger
urethane motor mounts? This is
the most commonly asked question concerning our motor mounts.
There have been no precise measurements of vibration done
compared against the stock motor mounts. We do not recommend
these mounts on automatic FD's. There is a big difference
in the load characteristics that increases vibration as
a result of the automatic transmission. But we do recommend
them for all manual drive high-performance RX-7's. Verbal
descriptions from one driver to the next can read like night
and day sometimes. We describe it as noticeable only at
low rpms, when starting out, but nothing that is really
excessive or uncomfortable. Most customers agree and are
happy with the results, but there are a handful of drivers
who report that the vibration is excessive to them. So use
your own judgement. There is going to be some increase in
vibration due to the characteristics of having a stiffer
motor mount. This should be expected by design. The stock
rubber mounts do reduce more vibration but in doing so they
do not last very long when repetitive stress is placed upon
them. Many performance modifications sacrifice some degree
of streetability comfort while enhancing performance. This
is the choice that drivers must make when making goals and
expectations. But again, we standby the description as being
minimal and more responsive to the driver.
*We request that you send us
your existing motor mount cores for modification, or pay
a core charge deposit that will be refunded upon the return
of your cores after exchange. Due to the many requests for
core exchanges, we may not have extra cores in stock available.
FC3S Urethane Motor
Urethane engine mounts give quicker shifting
and improved throttle response, than stock mounts. Will fit
vehicles with wet or dry sumps.
* When sending in cores, please include your contact information
in the shipment. Please state whether you are providing cores for
modification or returning your old cores for a core charge refund.