Aluminum 4in V/C Breather Tube Kit (Pair)

The Aluminum 4in V/C Breather Tube Kit (Pair) from B and B Performance Products is engineered to manage fuel vapors and crankcase pressure in high-performance marine engines. Whether you're running a pleasure cruiser, performance boat, or fishing platform, proper ventilation of fuel tank vapors is critical to engine reliability and fuel system integrity. This matched pair kit eliminates pressure buildup that can compromise fuel delivery and degrade seals over extended time on the water.

Constructed from lightweight aluminum, these 4-inch vent tubes are designed with a vented/compensating (V/C) design that allows safe passage of vapors while preventing fuel siphon or water intrusion into the tank. The 4-inch length accommodates typical fuel tank installations and bilge routing without kinking or restricting airflow. The paired configuration ensures balanced venting across dual-tank systems or provides redundancy on single-tank applications, maintaining consistent fuel system pressure during acceleration, deceleration, and extended cruising at various throttle settings.

Boaters with inboard engines, outboard high-performance setups, and fuel-injected marine powerplants benefit most from this kit, especially those operating in varied sea conditions where fuel slosh and pressure fluctuation are common. Installation is straightforward—the tubes connect between the fuel tank vent ports and the hull vent or charcoal canister, depending on your engine's fuel management system. Inspect breather tubes annually for salt spray corrosion and debris; aluminum construction offers strength with minimal weight penalty compared to steel alternatives.