Uni Filter 89-92 & 97 Polaris Big Boss / 90-00 Trailblazer 250 / 87-99 Trailboss 250 Air Filter - NU-8501ST

For over 50 years, Uni Foam Air Filters have been unsurpassed in both engine protection and overall performance. Their unique two-stage design produces more horsepower and more torque than any other air filter for your ATV.