Forged billet aluminum backing plate features Big SuckerT hidden breather technology and a radius air inlet for smooth airflow. Forged billet air filter covers feature exposed design and a CNC inverted top that acts as a velocity stack to help pull in more air flow. Hidden breathers are O-ringed at the heads and exits at throttle body/carb to create a virtually closed-loop system. Performance filters features a black synthetic filter element wrapped in a stainless steel jacket. Black stainless steel jacketed inverted filters feature an inverted pleated top and 360° of pleated sides to pull in filtered air from every angle. CNC-machined from forged billet aluminum. No external hoses or hardware needed. Made in the U. ALUMINUM / STAINLESS STEEL. Fitment Disclosure and General Safety Warning. Softail Low Rider S FXLRS. Road Glide Limited FLTRK. CVO Tri Glide FLHTCUTGSE. Electra Glide Standard EFI FLHTI. Softail Fat Bob 114 FXFBS. Softail Fat Boy 114 FLFBS. Softail Heritage Classic FLHC. Softail Heritage Classic 114 FLHCS. Softail Sport Glide FLSB. Softail Street Bob FXBB. CVO Road Glide Custom FLTRXSE. Softail Breakout 114 FXBRS. Softail Low Rider FXLR. Softail Fat Bob FXFB. Softail Fat Boy FLFB. Road King Special FLHRXS. Electra Glide Ultra Limited FLHTK. Street Glide Special FLHXS. Road Glide Special FLTRXS. Tri Glide Ultra Classic FLHTCUTG. CVO Electra Glide Ultra Limited FLHTKSE. Road King EFI FLHR. Street Glide EFI FLHX. Road Glide Custom FLTRX. CVO Street Glide FLHXSE. Electra Glide Police FLHTPI. Electra Glide Ultra Limited Low FLHTKL. Road Glide Ultra FLTRU. Electra Glide Ultra Classic EFI FLHTCUI.