SC520 comes as ordered with 2 1/2" tall performance
paper air filters elements but the scoop will accept
K&N E-3310 (3" tall x 6 1/4" Diameter) filter elements.
SC520 can be odered with an adjustable base for applications
that are not fixed at 8 5/8". The adjustable base
adapter setup can
accomodate Carb center to Center spacings up to 9 3/4" but
once you get over about 8 3/4"
center to center max you can only run a 2 1/16" tall filter in the front
because by moving the front adapter further
forward to accomodate the wider center to center you need to allow for the
butterflies to open over the top of the
front filter element.