Slight
blemished
from
attempted
install.
Unorthodox
Racing
Ultra
Accessory
pulleys
are
included
in
our
Ultra
Street
Sets
or
may
be
purchased
separately.
They
are
CNC-machined
from
light
weight
6061-T6
aluminum
billet.
As
with
all
Unorthodox
Racing
products,
tolerances
for
each
accessory
pulley
is
held
to
within
.001".
In
addition,
numerous
machining
steps
are
taken
to
ensure
the
pulleys
are
the
lightest
possible
design.
Premium
fit
and
finish
ensures
a
beautifully
matched
set
you
are
proud
to
display
under
the
hood
of
your
vehicle.
Power
gains
through
the
use
of
Ultra
Accessory
pulleys
are
obtained
through
weight
loss
(15%
to
30%).
Unorthodox
Racing
does
not
underdrive
with
the
accessory
pulleys
(most
applications)
for
two
reasons.
The
main
reason
is
because
all
underdriving
is
done
with
the
Ultra
Street
crank
pulleys.
This
provides
maximum
weight
loss
at
the
crank
where
most
of
the
horsepower
gains
are
found.
Second,
not
much
horsepower
is
gained
from
extreme
underdriving.
It
is
important
to
keep
charging
systems,
air
conditioning,
power
steering,
and
water
pumps
moving
fast
enough
for
every
day
driving.
Since
Unorthodox
Racing
Ultra
Accessory
pulleys
are
the
same
diameter
as
the
stock
units,
you
may
install
an
Ultra
Street
lightened
underdrive
crank
pulley
as
a
fi
rst
step.
Then,
at
a
later
date,
you
may
purchase
the
Ultra
Accessories
and
install
them
without
having
to
change
belts
again
(on
most
models,
otherwise
the
belt
part
number
is
included
in
the
instructions).