The venturi (funnel-shaped) air duct optimizes the air flow into the carburetor and accelerates the sucked in air mass. The funnel is simply attached to the carburetor flange to which the filter is normally attached. A light metal filter is included, but it does not have to be used.
Air filter Sport TNT MOUSSE SMALL 30 ° - 28/35mm Red
Air filter Sport TNT MOUSSE SMALL 30 ° - 28/35mm - Black
Air filter KN Small Black - Silver
Sport Air Filter TNT KN Small WHITE Straight d.28-35 for PHBG , PHVA , PHBN
Air filter C4 Yellow - Ø 19-21-24
Air filter Helix power 28-35mm carburetor connection (adapter) white
Air filter Helix power 28-35mm carburetor connection (adapter) Blue
Air filter Helix power 28-35mm carburetor connection (adapter) chrome