CNRAQR 9mm Fuel Cell Breather Vent Air Filter — 6AN Female Fitting, 0.85µm 20‑Mesh, Aluminum Alloy

The CNRAQR 9mm fuel cell breather/vent air filter with a 6AN female fitting is a compact, high-efficiency vent that prevents contaminants while improving airflow for automotive fuel systems.

This aluminum-alloy breather is engineered for fuel cell and fuel-system ventilation: a 9mm mounting hole, a 6AN (9/16-18 UNF) female thread, and a low-profile 2.2-inch height make it easy to install where space is limited. The element uses a 0.85-micron, 20-mesh grid designed to raise filtration efficiency while promoting straighter, cooler airflow into the vent. It ships as a kit with the filter body and the matching 6AN female fitting.

How does this breather protect my fuel system while letting air flow?

The breather balances airflow with particle exclusion by combining a fine mesh grid and a shaped element. Air can enter and exit the fuel system as pressure changes, but the 0.85-micron, 20-mesh filter traps most contaminants that could otherwise enter the tank or cell.

• 0.85-micron, 20-mesh element for up to 95% filtration efficiency
• Straightens airflow to reduce turbulent hot air intake
• Aluminum alloy housing resists corrosion and adds durability
• Allows pressure equalization without large open vents

Will this fit my vehicle or fuel cell installation?

Fitment relies on two main dimensions: the mounting hole diameter and the fitting thread. The CNRAQR breather fits a 9mm (0.35") mounting hole and includes a 6AN (9/16-18 UNF) female fitting for common fuel-line applications.

• Mounting hole: 9mm / 0.35" diameter
• Fitting thread: 6AN (9/16-18 UNF) female included
• Compact size: 2.2" height (excluding fittings), 2" width for tight spaces
• Commonly used on performance fuel cells, aftermarket tanks, and vented caps

How does this part affect performance and engine response?

By improving the quality and direction of airflow into the breather, the filter helps reduce ingestion of hot underhood air and particulates. Cleaner vent air and less turbulence support consistent fuel system behavior and can contribute to more stable throttle response.

• Reduces hot-air ingestion by straightening incoming airflow
• Helps maintain cleaner venting to protect fuel system components
• Lightweight aluminum design avoids adding significant mass

What should I know about installation and maintenance?

This breather kit is sold with the filter and a 6AN female fitting; professional installation is recommended because proper sealing and routing matter for safety and performance. The filter element may require periodic inspection depending on operating environment.

• Includes: one air filter and one 6AN female fitting
• Professional installation recommended; no instructions included
• Inspect and replace or clean as needed in dusty or contaminated environments

Who this is for: The CNRAQR 9mm breather/vent air filter kit suits performance-minded hobbyists, motorsport teams, and anyone fitting or upgrading fuel cells, aftermarket tanks, or vented fuel caps where compact, efficient filtration and a 6AN connection are required. If you need a small, durable vent that reduces particulate ingress and straightens airflow for more consistent fuel-system behavior, this kit is designed for those applications. Note: this product requires correct installation; consult a qualified technician if you are unsure about fitment or routing for your vehicle or tank.