Marchald fire retardant air filter

Oem: 17213-MKE-AF0.
From Italy comes the first advancement in foam air-filter elements in decades. Marchald filters are made of top quality polyester that resists deterioration from gasoline, with two layer construction using dense foam on the inside and a more open-cell foam on the outside. The entire outer surface is ribbed to increase available filtration area while maintaining the filter's original overall size, and the inner mounting ring has a deep channel that prevents the element from slipping off its frame and allowing unfiltered air into the engine.

Image reflects the exact shape.