Arlen Ness Stage I Big Sucker Air Filter Kits for 1988-up Harley Sportsters - OEM Cover - 18-824 1973 Suzuki TM400 SRS (self-regulating seals) system increasing

SRS (self-regulating seals) system increasing longevity

2014 Arctic Cat 450 TRV

Almost two decades ago

Namura Forged pistons offer dyno-proven gains in performance and durability over industry-standard 4032 forged pistons

(1) Top cover gasket

Arlen Ness Stage I Big Sucker Air Filter Kits for 1988-up Harley Sportsters - OEM Cover - 18-824 1973 Suzuki TM400 SRS (self-regulating seals) system increasingArlen Ness Big Sucker Air Filter Kit Engineered and proven to give your engine maximum airflow for more horsepower & torque Each Big Sucker performance filter is handmade in the USA Urethane is added on the top of the filter to supports the shape and reducing cover vibration Smooth radius air inlet engineered to provide maximum airflow directly into the engine One piece aluminum backing plate Includes all necessary hardware and instructions Made in