Briggs & Stratton air filter for Quantum, Series 625, Series 650 and Series 675 vertical crankshaft engines and Intek, Intek I/C, PowerBuilt, Series 800, Series 900, Series 1350, Series 1450 and some Vanguard horizontal crankshaft engines.
This filter measures 131mm x 114mm across the blue seal.
The pre cleaner for this air filter is part number 491435S (horizontal crankshaft engines) or 493537S (vertical crankshaft engines).