9S6147 Body A Precleaner Fits Caterpillar 3126B 3306 C-9 3306 3306B SR4 12H 120HOne New Aftermarket Replacement Pre Cleaner Body Fits Caterpillar (Fits CAT) Equipment and Engines This aftermarket replacement pre cleaner body (Body A) is part of the air intake pre cleaner assembly on Fits Caterpillar equipment and engines. It serves as the first stage of air filtration, helping to separate larger particles from incoming air before they reach the main air filter housing, extending filter service life and protecting the engine in