4into1 Uni Filter BF-1 12" x 16" x 5/8" Green 65-PPI Fine Foam Sheet — Hi-Flow Oiled ATV/UTV Filter Media

The 4into1 Uni Filter BF-1 is a 12" x 16" x 5/8" hi-flow, 65-PPI green polyurethane foam sheet designed to be wetted with filter oil to trap dirt, dust, and mud for superior ATV engine protection.

If you need a versatile replacement or a custom-cut foam element for off-road vehicles, the Uni Filter BF-1 supplies a high-porosity, fine-cell medium that pairs with sticky filter oil to capture contaminants while preserving airflow. Sold as an oversize sheet, it’s intended for vehicle-specific conversions or to create multiple custom filters, offering an economical way to refresh or build air filtration systems for ATVs, dirt bikes, UTVs, and other powersports machines.

How does this foam filter stop dust without choking the engine?

The BF-1 uses open-cell polyurethane foam at 65 pores-per-inch (PPI), which balances particle retention with airflow. When saturated with quality filter oil, the foam’s cells create a tacky barrier that traps airborne grit and mud but still permits the necessary volume of intake air.

• 65-PPI fine-cell foam captures small particulates while remaining breathable
• Open-cell structure maintains consistent airflow to reduce power loss
• Designed to be oiled for maximum particulate adhesion

What are the physical dimensions and material details I should know?

The sheet measures 12 inches by 16 inches with a 5/8-inch thickness, giving you enough material for one or multiple custom elements depending on your application. Constructed from hi-flow green polyurethane, the foam resists degradation from normal handling and can be trimmed and shaped to match specific filter boxes or cores.

• 12" x 16" x 5/8" sheet size for flexible use
• Hi-flow green polyurethane foam, 65-PPI fine cell
• Trim-and-fit friendly for custom housings and DIY projects

How do I install, treat, and maintain this uni filter foam?

Trim the sheet to the shape of your filter frame or wrap it over a filter core, then evenly coat both sides with a compatible foam filter oil. After oiling, let excess drip off and reinstall; periodic cleaning and re-oiling keep filtration performance consistent.

• Cut to fit your existing frame or mold into a custom element
• Apply foam filter oil evenly to both faces for effective trapping
• Clean with a detergent or foam cleaner, dry fully, and re-oil on service

Who is this for: The 4into1 Uni Filter BF-1 sheet is ideal for DIY mechanics, small fabrication shops, and off-road riders who need a replaceable, customizable foam medium. It suits anyone building or repairing ATV, UTV, or dirt bike filters who wants an economical, high-flow foam that accepts oiling and can be shaped to specific vehicle requirements.

Features at a glance:

• Hi-Flow green filter foam sheet
• 12 inches x 16 inches x 5/8 inch
• 65-PPI fine cell for balanced filtration and airflow
• Unlimited potential for use in custom applications
• Fit type: vehicle-specific when trimmed and installed

Notes: Use compatible foam filter oils and follow manufacturer cleaning intervals to avoid over-oiling or solvent damage. This product is supplied as a raw foam sheet for conversion and is not a pre-shaped, boxed filter element; ensure proper sealing and fit when fabricating replacements.