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
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.