Billet Specialties 21820 - PCV Breather Ball-Milled Polished 1-1/4" Valve Cover Hole

Billet Specialties breathers are precision machined in the USA from 6061-T6 billet aluminum and feature a unique 2 pc. design with a positive O-ring seal. Breathers are easily maintained with a washable filter element, while the PCV breather features a common replaceable PCV valve with a barbed fitting for 3/8 hose. Available for 1 or 1-1/4 diameter valve cover holes. Valve covers should be run with one breather and one PCV valve or PCV breather for proper air circulation.