O’BRIEN TRUCKERS now offers these faithful reproductions of the cool open-front 4-barrel Nicson air cleaners styled to look like a “spark arrester”, to compliment the 2-barrel version they also manufacture. The spark arrester-style air cleaners are fully polished as shown, and are equipped with a washable cotton gauze filter element. They fit all 4-barrel carburetors with a 5-1/8” neck, and come with a mounting stud and stainless acorn nut. The price is $150 each. They’re featured on O’BRIEN TRUCKERS’ all-new website, along with a truckload of other period-correct nostalgic products. O’BRIEN TRUCKERS, 29 A Young Road, Charlton, MA 01507 508-248-1555. www.obrientruckers.com