Traxxas air filter housing for the T-Maxx 2.5 Black plastic air filter housing with cover screen and changeable element. AIR FILTER HOUSING: Attaches to the throat of the carburetor. INCLUDED: One screened filter, One rubber straight neck, One rubber adapter, One zip tie. Required Parts TRX 2.5 engine or any carburetor that has a 14mm or 13mm outer carb throat opening.