Key Features

• Genuine Briggs & Stratton OEM air filter, model 399877S, sold as a five-filter multipack (4103) for repeat servicing.
• Flat panel cartridge design with pleated media for efficient dust capture and steady airflow to protect the carburettor and combustion chamber.
• Filters out dust and debris ingress, reducing carburettor contamination and internal wear to maintain reliable engine performance.
• Five-filter pack supports routine maintenance across multiple machines, seasonal servicing, or workshop stock for quick replacements.
• Part references 399877S (individual) and 4103 (5-pack) provided for accurate identification and ordering.
• Designed for Briggs & Stratton small petrol engines with flat panel air cleaner housings, notably Quantum 3.5 hp select 10 cu in L-Head engines and related models.
• OEM standards: Genuine Briggs & Stratton OEM, manufactured to original equipment specifications.

Product Details

• Product Type: Air Filter Cartridge (Flat Panel)
• Filtration Media: Pleated paper/foam for efficient dust capture
• Part References: 399877S (individual), 4103 (5-pack)
• Compatibility: Briggs & Stratton small petrol engines with flat panel air cleaner housings
• Application: Engine air filtration to protect carburettor and internal combustion components
• Quantity Per Pack: 5 filters
• OEM Standards: Genuine Briggs & Stratton OEM, manufactured to original equipment standards
• Fitment Notes: Intended for Quantum 3.5 hp select 10 cu in L-Head configurations and related small horizontal shaft vertical crank models

Compatibility

• Briggs & Stratton small petrol engines with flat panel air cleaner housings
• Quantum 3.5 hp select 10 cu in L-Head configurations
• Related small horizontal shaft vertical crank models
• Fitment reminder: verify compatibility by comparing your engine’s OEM part number or existing filter before ordering