40B21921 LYCOMING PIPE - EXHAUST #4 40B21921. Engine exhaust component. Application: aviation aftermarket general fitment — verify part number against your aircraft IPC before ordering. Cross-reference this part by its manufacturer part number 40B21921 against your aircraft's illustrated parts catalog (IPC) or maintenance manual to confirm direct interchangeability. All inventory ships from our Arizona warehouse with FAA 8130-3 documentation where applicable, and traceability paperwork is available on request for parts requiring it. Call American Aviation Parts for inventory verification, cross-reference assistance, or to confirm certification status before placing your order.
