Pancake Air Filter for Buses upto 1979. AC129781 AC129781 Was £15.00 - Now £13.50! Quantity: at £13.50 each Add To Basket 1.5 inch tall pancake style air filter for use on stock carburettors. Supplied with a paper filter element, chrome base and top. Fitted with a 1/2'' hose barb for use with the standard oil filler/breather. Fits 1200-1600cc split & baywindow buses.