ITG Ford Fiesta ST180 direct replacement panel filter.
The Tri-Foam System
Why foam? Because, compared to paper or other filter technologies, reticulated polyester foam achieves optimum performance against three key criteria:
MAXIMUM AIR FLOW
the ability to allow air to pass through without causing a large drop in pressure.
the capability to arrest a high proportion of airborne dust while feeding the engine clean air.
DUST LOAD-UP TOLERANCE
the capability to absorb a large amount of dust without reducing air flow capacity.