Polyurethane as a material choice has little to do with "stiffness",
the hardness and shape of the polyurethane is what determines how
stiff it will be and must be tuned to the application.  If you look at
the pics, it's a much larger isolator. A larger softer isolator, with
no air gaps. The rubber rots, the poly is more resilient. True the OE
mounts can last for 20 years, and so will these.. they do offer better
damping with less movement than stock, but as to why you'd want to buy
ours for $167 when you can buy cheap ones for $36... most people
won't.

Unfortunately for us we didn't yet know about $36 alternatives. Is it
worth the price difference for our mount? Depends on how much money
you have and how far you are trying to take your van
repairs/improvements.. it is without a doubt a better mount than stock
for both isolation, motion control, and longevity. But again for most
likely not worth it... so suffice it to say, only 10 of these mounts
were/are ever going to be produced.  As to any other reasons you might
want to buy anything Bostig over OE, all I would have to say there is
look what VW has done with your money, and look at what we are doing
with your money, it's your choice. They will continue to discontinue
while we're trying hard to make it practical to keep something
practical practical, with passion, innovation, genuine care, and a
dose of insanity.

A little bit of support to us goes a lot further than a little support
to them not just in terms of how it is used, but also how it is
appreciated, I guarantee it.

Jim

On Mon, Aug 4, 2008 at 3:12 PM, Michael Snow <mwsnow@gmail.com> wrote:
> I agree that it is another choice, but what makes it better?
> Polyurethane tends to be stiffer and transmit vibration/noise to the
> chassis better than plain old rubber.