Briggs & Stratton Air Filter - 393957S (4 Pack - 4106)

Overview

Briggs & Stratton Genuine OEM foam air cleaner element, model 393957S, sold as a 4-pack under SKU 4106. Foam filtration traps dirt and debris while preserving essential airflow for efficient combustion, protecting the carburetor and internal engine components. The 4-pack supports routine maintenance, seasonal servicing, or stocking multiple machines in workshops, fleets, or households. Designed for walk-behind lawn mowers and other small Briggs & Stratton petrol engines that use foam air cleaner housings, optimized for 7hp–18hp horizontal-crank Briggs & Stratton engines.

Key Features

• Part Numbers: 393957S (individual filter), 4106 (4-pack)
• Type of machine: Suitable for 7hp–18hp horizontal-crank Briggs & Stratton engines; compatible with walk-behind mowers and other small Briggs & Stratton petrol engines with foam air cleaner housings; validated for Briggs & Stratton single-cylinder families in 450E, 500E, 550E, 550EX, 575EX, 625EX, and 675EX series with matching foam housings
• Installation tips: Verify fit before ordering by checking the engine code tag, housing style, and exact model number; ensure the foam element seats securely in the air cleaner housing to maintain proper airflow; include in routine maintenance or seasonal servicing; four filters per pack support multi-machine servicing

Compatibility

• Suitable machine models: Briggs & Stratton single-cylinder engines in the 450E, 500E, 550E, 550EX, 575EX, 625EX, and 675EX series with matching foam filter housings
• Alternative part numbers: 393957S (individual), 4106 (4-pack SKU); alternative part numbers refer to the same foam air cleaner design for compatible housing configurations
• Fitment considerations: Confirm fit by engine code tag, housing style, and exact model number before purchase