Key Features

• Genuine Briggs & Stratton OEM air filter, model 394018S; sold as a four‑unit pack under SKU 4135 for reliable replacement and installation consistency.
• Foam filtration element traps dust and debris while preserving airflow required for effective combustion and engine performance.
• Four filters per pack provide coverage for multiple maintenance intervals, workshop needs, or fleet servicing.
• Optimised for larger Briggs & Stratton petrol engines with foam‑type air cleaner housings, helping prevent carburettor blockage and reducing internal wear.
• Part references 394018S (individual) and 4135 (4‑pack) ensure accurate identification and ordering.
• Suitable for engines in ride‑on mowers, garden tractors, and similar high‑output outdoor equipment.

Product Details

• Product Type: Foam Air Filter / Air Cleaner Element
• Pack Quantity: 4 filters
• Filtration Type: Foam
• Part References: 394018S (individual) | 4135 (4‑pack SKU)
• Application: Engine air filtration to protect the carburettor and internal components
• Purpose: Maintains optimal airflow and debris capture for larger Briggs & Stratton engines

Compatibility

• Designed for Briggs & Stratton twin and V‑twin petrol engines with matching foam‑type air cleaner housings; typical usage on ride‑on mowers, garden tractors, and similar outdoor machinery.
• Typical engine families include horizontal twin and V‑twin configurations rated roughly 12.5 hp to 21 hp, with common series such as 402400, 421400, and 422400.
• Briggs & Stratton Vanguard OHV V‑Twin engines may use this foam‑filter design depending on the air cleaner housing design.
• Fitment tip: Compatibility is determined by the engine’s exact model and air cleaner housing design—always verify the engine tag/serial and compare with the current air filter before ordering.