Spec II now sells a 2-1
air intake system that fits RD350s, RD400s and RZ350s. We use a
K&N filter because we believe it provides superior airflow and
more consistent jetting over time since it doesn't load up with
blowback byproducts - any accumulated will evaporate overnight.
The K&N filter can be ordered separately.
# AF21 - K&N filter, 2:1 tube, adapting sleeve, hose clamp
# AFKN - K&N, adapting sleeve