ITG Megaflow Air Filter 50/120ITG Megaflow JC50 120 Big Twin Carburettor Filter. Suitable for most 4 cylinder engines using throttle bodies or carburettors. These robust filters are the standard fit for most competition cars around the world. The two red fibre reinforced nylon injected mouldings which form the structure have our unique Tri Foam filter system bonded to them to give the ultimate in performance. Specifications Material Foam Lenght 436 mm Width 148 mm Internal Height