Outerwears Air Filter Pre-Filter Assembly - 14" x 4" Element - Black M591 1217Since 1938

1217Since 1938

Fitment Note with Throttle Body Spacer:

1979-2000 GMC C3500

E85 & more)

Outerwears Air Filter Pre-Filter Assembly - 14" x 4" Element - Black M591 1217Since 1938Pre Filters unique polyester material contains uniform, micron sized openings to allow air in while filtering out the grime that will eventually clog an air filter or breather. Founded 45 years ago, Outerwears was created to fulfill a desperate need to keep the Air filter and engine clean during off road racing. Racers and engine builders were experiencing loss of horsepower and engine damage due to sand, dirt, and other debris prematurely packing