81-300 | SideKick Air Cleaner, Black denim onesie 99-17 Twin Cam/88-up XL/93-99 Evo:

99-17 Twin Cam/88-up XL/93-99 Evo: 18-098

Patent-pending oil catch is integrated into the backing plate and acts as a reservoir by stopping any excess breather oil from ever reaching the air filter

this round sign delivers a classic Harley® vibe

Made of high-quality brass and finished with classic H-D blue for a pop of color

X-Small:  Measures approximately 2"W x 2

81-300 | SideKick Air Cleaner, Black denim onesie 99-17 Twin Cam/88-up XL/93-99 Evo:Arlen Ness 81 300 The Sidekick air cleaner is an angled version of our forged billet air cleaners that provides excellent legroom and increased airflow. The performance air filter is made from a black synthetic filter element wrapped in a stainless steel mesh and accepts a clear polycarbonate window to view your intake system in action Angled Shape Patented backing plate technology (US Patent: US 10,851,741 B1) High performance Synthetic air filter