Briggs & Stratton Air Filter - 393957S

Overview

Manufacturer: Briggs & Stratton

The Briggs & Stratton Air Filter - 393957S is a genuine OEM foam air filter designed for Briggs & Stratton small petrol engines that use foam-type air cleaners. It balances dust filtration with airflow to support efficient combustion and reliable engine performance, helping to maintain clean air delivery to the carburetor and prolong engine life.

Key Features

• Part Number: 393957S
• Type of machine: Briggs & Stratton small petrol engines with foam air cleaner housings; compatible with 450E, 500E, 550E, 550EX, 575EX, 625EX, 675EX series and related foam-filter-equipped engines
• Installation tips: Direct replacement that fits into the engine’s air cleaner housing; confirm fit by comparing with the existing filter or checking the engine code tag
• Filtration medium: Foam filtration element designed to trap dust while preserving airflow for efficient combustion
• Maintenance guidance: Replace as part of routine service to maintain airflow balance and engine efficiency
• OEM assurance: Genuine Briggs & Stratton OEM part engineered to original specifications for accurate fit and reliable performance

Compatibility

• 450E / 500E / 550E / 550EX horizontal single-cylinder engines; 575EX / 625EX / 675EX engines with foam-filter housings; classic and new generation small Briggs & Stratton engines used on pedestrian mowers and light garden equipment
• Fitment notes: Compatibility depends on the engine model number and air cleaner housing design; verify by checking the engine code tag or comparing with the existing filter
• Alternative part numbers: Not listed in provided data