Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery. P/N 15662 Breather for 1/16" Vacuum/Boost Port. Replacement breather for the vacuum/boost nipple that comes stock in all Aeromotive Bypass Regulators.  Perfect for any application that does not require fuel pressure to be influenced by manifold pressure. 1/16" NPT Male threads directly into the regulator vacuum/boost port. Machined from bronze, compatible for installation into aluminum ports. Bronze breather element allows air to move into and out of the regulator cap as needed while stopping dirt and debris from entering the regulator cap/spring housing. Direct replacement for all Aeromotive bypass regulators where needed. For a 5/32" barb vacuum/boost nipple see P/N 15630. For a AN-04 vacuum/boost conversion see P/N 15619.