The Inverted Series air cleaner brings in the technology that is patented from the Big Sucker Kit along with an inverted filter top that boosts airflow by pulling in air from the face of the air cleaner as well as the traditional method of pulling air from each side. The entirety of the kit is forged from billet aluminum to allow for the best performance and style possible. Choose between one of stylish and sleek covers Arlen Ness has to offer to have your bike standing out and being the conversation starter. CNC machined from forged billet aluminum Forged billet air filter covers feature exposed design and a CNC inverted top that acts as a velocity stack to help pull in more airflow Forged billet aluminum backing plate features patented Big Sucker hidden breather technology and a radius air inlet for smooth airflow Hidden breathers are O-ringed at the heads and exits at throttle body/carb to create a virtually closed-loop system No external hoses or hardware needed Black stainless steel jacketed inverted filters feature an inverted pleated top and 360° of pleated sides to pull in filtered air from every angle Performance filters features a black synthetic filter element wrapped in a stainless steel jacket Filter is water-resistant, eliminating the need for a rain sock