Abstract: An adapter assembly includes an adapter body extending from an adapter inlet to an adapter outlet, a canister mount for securing the adapter body to an air filter canister, and an adapter joint for securing the adapter body to the canister mount. The canister mount includes a collar that is secured about the air filter canister. The adapter joint allows the adapter body to be moved away from the air filter canister for air filter replacement without having to disconnect the adapter body from the air filter canister. Precleaners are airtightly securable to the adapter body inlet, and the air filter canister is airtightly securable to the adapter body outlet. Air cleaned by the precleaners before reaching the air filter has less contamination to be filtered by the air filter before the air flows into an engine. Precleaning significantly extends the life of air filters.