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Custom Air Cleaner Assembly; K&N Custom 66 Series custom air cleaner assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide serious air flow.

Custom Air Cleaner Assembly; K&N Custom 66 Series custom air cleaner assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide serious air flow.

Velocity Stack Assembly; This complete air filter assembly has an all stainless steel top and base with a mirror finish. It's velocity stack has a 5-1/8 inch flange and the total height is 8-1/4 inches in height.

Velocity Stack Assembly; This complete air filter assembly has an all stainless steel top and base with a mirror finish. It's velocity stack has a 5-1/8 inch flange and the total height is 10 inches in height.

Velocity Stack Assembly; This complete air filter assembly has an all stainless steel top and base with a mirror finish. It's velocity stack has a 7-5/16 inch flange and the total height is 8-1/4 inches in height.

Velocity Stack Assembly; This complete air filter assembly has an all stainless steel top and base with a mirror finish. It's velocity stack has a 7-5/16 inch flange and the total height is 10 inches in height.

Round Air Filter Assembly; K&N Custom air cleaner assemblies designed for use on nostalgia engines. They incorporate our famous K&N Air Filters and combine high air flow with great looks. Available in 4 different styles.

Round Air Filter Assembly; These custom air cleaner assemblies are designed for use with engines that use a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type.

Custom Racing Assembly; K&N Custom Air Filter kits are designed to boost the performance from your carburetor while keeping dirt on the outside where it belongs. These assemblies come with custom chrome top and base plates and a K&N washable air filter.

Custom Racing Assembly; K&N Custom Air Filter kits are designed to boost the performance from your carburetor while keeping dirt on the outside where it belongs. These assemblies come with custom chrome top and base plates and a K&N washable air filter.

Custom Racing Assembly; K&N Custom Air Filter kits are designed to boost the performance from your carburetor while keeping dirt on the outside where it belongs. These assemblies come with custom chrome top and base plates and a K&N washable air filter.

Custom Racing Assembly; K&N Custom Air Filter kits are designed to boost the performance from your carburetor while keeping dirt on the outside where it belongs. These assemblies come with custom chrome top and base plates and a K&N washable air filter.