Breather Filter – Round, 4‑Pack

These replacement breather filters from Billet Specialties are designed for round valve cover breathers. Sold in packs of four, they’re made from reusable black foam and fit standard round breather housings. Ideal for refreshing your valve cover breathers without replacing the entire housing assembly.

• Round foam breather elements
• Black reusable foam
• Sold as a set of four
• Direct replacement for Billet Specialties round valve cover breather housings