Used carbon canister filled with charcoal or carbon particulates for the Mercury Cougar or Ford Mustang. This unit mounts to or near the passenger side (right hand) engine frame mount. All 1970 California sold Cougars and Mustangs came with this canister to comply with California's strict emission standards.
Ford part # D0AZ-9D653-C, casting # D0AF-9D653-C.
*NOTE* These are 40 year old canisters, at this late stage the filtering ability of the particulates are probably not that effective for pollution testing. Primarily sold for concours judging.