K&N AIR FILTER - COTTON GAUZE, ROUND, HIGH FLOW
1985 CHEVROLET K5 BLAZER SILVERADO 8 CYL 5.7L I found this on autopartsworld.com is this a good filter for this truck

 

If you drive all city, then it's fine but for any unpaved roads or offroad, stick with paper filters since K&N don't filter as well. The difference in air isn't enough to warrant allowing in more debris into the engine.