Through extensive research and testing using the SAE J726c air cleaner test, Pipercross have developed the perfect combination of filter density and thickness of each layer. Where Pipercross filters are impregnated with the dirt retention additive, the filtration performance is greater enhanced - the additive helps the foam to swell, opening pores whilst providing a "sticky" layer to hold more dirt.
Pipercross foam is the secret to a lightweight, longlife performance air filter.
Pipercross air filters consistently outperform paper and cotton-gauze rivals to supply air to the engine - even when dirty! This is thanks to the multilaminate construction used in every Pipercross performance air filter. Layers of varying porosity foam all work together to trap different sized particles.
Air filter efficiency testing