Wehrli Custom Fabrication Universal Outerwear Air Filter Cover for WCF100717 & WCF100719 (WCF100728)

Protect your engine and extend the life of your performance air filter with the Wehrli Custom Fabrication (WCF) Universal Outerwear Air Filter Cover. This pre-filter is specifically designed to fit WCF100717 4-inch and WCF100719 5-inch air filters, providing a critical secondary defense against moisture and heavy debris without sacrificing airflow.

The WCF100728 features a specialized hydrophobic treatment that causes water from puddle splashes or rain to bead off the surface. Beyond water resistance, the mesh is engineered to stop particles as small as .005 inches, preventing premature clogging of the main filter element. This is an essential upgrade for vehicles with exposed filters or those used in harsh environments like dirt tracks, pulling, or off-road driving.

• Compatibility: Specifically fits WCF100717 (4") and WCF100719 (5") air filters.
• Water Resistant: Hydrophobic treatment repels moisture (not waterproof; do not submerge).
• Advanced Filtration: Screens out debris down to .005".
• Durable Construction: Puncture resistant, UV resistant, and heat resistant up to 450°F.
• Maintenance: Clean with mild soapy water; do not scrub. Treatment lasts 6–12 months depending on conditions.
• MPN: WCF100728

To verify the hydrophobic coating is still active, perform a simple spray bottle test. If water beads off, the treatment is working; if water enters the mesh, it is time to replace the cover to maintain optimum engine protection.