The K&N velocity stack air filter adapter turns your carburetor adapter into a velocity stack for improved airflow at lower throttle openings and higher velocities at larger throttle openings.  The K&N velocity stack adapter smooths the airflow before it enters your carburetor producing a laminar flow effect.  The smoother flow produces a stronger vacuum signal at the nozzle for improved atomization and delivery.

The velocity stack adapter has an oval OD flange measuring 60mm x 65mm with a 53mm length.  The adapter has cut outs for the Keihin FCR air jets and is made from lightweight and high strength nylon for long use.  Comes ready to install on any FCR35-FCR41 carburetor, does NOT include hardware or o-rings.  Those items should already be present, if not let us know and we'll make sure to include some with your order.

Works with ANY 2 7/16" (62mm) ID flange filter.