Crank Vent Chrome Top 3/

The K&N Crank Vent Chrome Top 3/4 in. OD Tube Breather is a clamp-on crankcase ventilation component designed for engine builders and modification enthusiasts who demand reliable blow-by management without sacrificing engine bay aesthetics. This reusable breather serves as a critical part of any performance engine's PCV system, preventing harmful pressure buildup inside the crankcase while maintaining proper oil mist separation. Whether you're building a custom street engine, upgrading a classic hot rod, or fine-tuning a weekend warrior, this K&N engineering breather combines functional durability with the polished chrome finish that complements modern engine bay detailing.

Constructed from a combination of rubber and steel materials, the Crank Vent Chrome Top features a 3/4 inch outside diameter tube that integrates seamlessly into most hose routing configurations. The chrome-finished top housing provides both corrosion resistance and visual appeal, while the reusable design eliminates the need for frequent replacements—a practical advantage when you're running extended dyno sessions or high-mileage break-in procedures. The round clamp-on design allows straightforward installation without requiring permanent modifications to engine block or existing ventilation lines, making it an excellent retrofit option for older engines or a clean integration point in new builds. K&N's proven engineering ensures efficient separation of oil vapors from crankcase gases, reducing sludge accumulation and extending engine longevity.

This breather excels in naturally aspirated and moderate forced-induction applications where consistent crankcase evacuation is non-negotiable. Mechanics and engine builders appreciate its compact footprint—measuring just 4 x 2 x 6 inches and weighing only 0.16 pounds—which allows flexible mounting in tight engine bays without consuming valuable real estate. The 3/4 inch OD tube diameter matches common hose sizing found in street rods, muscle car restorations, and custom V8 builds, ensuring compatible connections with existing PCV hose and catch-can plumbing. Installation is straightforward: secure the rubber-mounted base with the provided clamp, route standard automotive hose to your oil separator or catch-can system, and enjoy years of dependable performance with minimal maintenance.