A-1930347-AI Air FilterOne New Aftermarket Replacement Inner Air Filter for Fiat Tractors This inner (secondary) air filter is a direct aftermarket replacement for Fiat agricultural tractors, serving as the safety element inside the dual stage air filtration system to protect the engine from fine dust and debris that pass through the outer primary filter. Compatible Models Fiat: 115 90, 115 90DT, 130 90, 130 90DT, 140 90, 140 90DT, 160 90, 160 90DT, 180 90, 180 90DT, 1180,