Collection: Auto - Oil Breather Cap

Improve your engine’s crankcase ventilation and add a custom look to your bay with our selection of Auto Oil Breather Cap components. At DIY Customs, we provide high-performance push-in and twist-lock breather caps, specialized filtered vents, durable chrome valve cover caps, and heavy-duty PCV-integrated breathers designed for a perfect fit. Whether you are relieving crankcase pressure on a high-horsepower race engine, replacing a clogged factory oil cap to prevent seal blowouts, or adding a stylish finishing touch to a restoration project, our professional-grade hardware offers the filtration and airflow you need at unbeatable prices. From specialized baffle-protected breathers to direct-fit caps for popular muscle cars, trucks, and classic engines, we carry the essential gear for every powertrain upgrade. Don't see the specific mounting style (Push-In/Twist-On), neck diameter (1"/1.22"), or specialized finish for your valve covers? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!