This range of air filter neck reducing rings will allow you to alter the inlet size of a cone filter to a smaller diameter, very useful if you have an existing filter that needs to be adapted to fit a new vehicle.
Simply insert a ring into the filter inlet (neck) and then use the fixing clip to tighten the assembly to the air intake system.

Specifications

Converts Filters Inlet Size From - 90mm to 80mm
Wall Thickness: 5mm
Width: 18mm