Chrome Breather Cap/Grom

The TRANS-DAPT Chrome Breather Cap with Grom (SKU TRA4871) is a push-in engine breather solution engineered for custom and high-performance engine builds where intake or crankcase ventilation needs a clean, reliable outlet. This steel breather cap features a chrome finish that resists corrosion while maintaining a professional appearance under the hood, and it accommodates a 1-1/4 inch hole with an included grommet for secure mounting.

The round design allows easy integration into custom headers, air cleaners, and block-mounted vent systems common in street rods, hot rods, and modified engine compartments. At 0.46 lbs and measuring 4.8 x 3.3 x 5.1 inches, the cap is lightweight and compact enough to fit tight engine bays without disrupting hose routing or component placement. The grommet included with the cap ensures a sealed fit in your mounting hole, preventing unwanted air leaks while allowing controlled crankcase pressure relief—critical for engine longevity and preventing gasket blow-out in forced-induction or high-RPM applications.

This breather cap serves builders and enthusiasts who demand precision components and authentic finishes for their custom engine work. Whether you're fabricating a vintage restoration, a street performance build, or an off-road powertrain, a quality breather cap prevents oil sludge accumulation in intake manifolds and ensures consistent crankcase ventilation. The chrome finish complements polished valve covers and detailed engine compartments, while the steel construction provides durability under heat and vibration cycles typical of high-output engines.