• Upgrade Your System: This 1/16' NPT breather (Part Number 15662) is a direct replacement for the stock vacuum/boost nipple in all Aeromotive Bypass Regulators. Get yours now! • Bronze Build: Machined from high - quality bronze, it's perfect for installation into aluminum ports. • Airflow & Protection: The bronze breather element allows air movement while keeping dirt and debris out of the regulator cap. For applications not requiring fuel pressure influenced by manifold pressure, this breather is ideal. For a 5/32' barb vacuum/boost nipple, see Part Number 15630. For an AN - 04 vacuum/boost conversion, see Part Number 15619.

This Aeromotive breather is great for any setup where you don't want manifold pressure to affect fuel pressure. It's perfect for mechanics and car enthusiasts who are working on Aeromotive bypass regulators. The breather has 1/16' NPT male threads and is machined from bronze, which makes it suitable for installation in aluminum ports. It lets air move in and out of the regulator cap as needed and keeps dirt out.