Key Features

• Genuine Briggs & Stratton OEM foam air filter cartridge (part 394018S / 394018) engineered to match original specifications for dependable fit and performance.
• Large foam filtration element captures dust and debris while preserving necessary airflow for efficient combustion.
• Heavy‑duty construction designed to withstand dusty outdoor environments and demanding mowing or garden tractor use.
• Engine protection through reduced intake of contaminants, helping prevent carburettor blockage and premature internal wear.
• Designed for larger engines suited to Briggs & Stratton horizontal twin and V‑twin configurations (approximately 12.5 hp–21 hp), including ride‑on mowers and garden tractors.

Product Details

• Product Type: Foam Air Filter / Air Cleaner Element
• Part Reference: 394018S / 394018
• Material: Foam filtration media
• Compatibility: Briggs & Stratton twin and V‑twin petrol engines (~12.5 hp–21 hp)
• Application: Engine air filtration to protect carburettor and internal components
• Why Choose This Filter: Maintains proper airflow balance, supports efficient combustion, and contributes to longer engine life in demanding outdoor applications.
• Fitment Tip: Compatibility depends on the engine’s exact model number and air cleaner housing size — verify your engine code/tag and compare with the existing filter before ordering to ensure the correct match.

Compatibility

• Engine families: Briggs & Stratton horizontal twin and V‑twin engines rated roughly 12.5 hp–21 hp
• Typical series: 402400, 421400, 422400 twin‑cylinder horizontal engines used on larger outdoor machines (garden tractors, ride‑on mowers)
• Briggs & Stratton Vanguard OHV V‑Twin engines used in high‑power horticultural equipment
• Important: Fitment depends on the engine model and air cleaner housing size; always verify engine code/tag and compare with the existing filter to ensure correct match.