The fender to cowl seals tends to deteriorate over the years, becoming very brittle and discolored. Therefore, it is essential to replace these seals when restoring or rebuilding your square-body truck to prevent annoying wind noises and debris from becoming trapped between the cowl and fender. Holley Classic Trucks reproduction fender to cowl seals is a duplicate of the seals found on 1981-1991 square bodies.