Vanguard Cyclonic Inner Air Filter for 26/28/32/36hp and 37hp EFI Engines SKU: 821136

A clogged or missing inner air filter lets fine dust and debris slip past your outer filter straight into the engine—contamination that accelerates wear on rings, cylinders, and valves. This cyclonic inner filter provides the secondary protection your Vanguard engine needs to handle tough mowing conditions.

Why Cyclonic Design Matters

• Cyclonic flow design helps separate particles before they reach the filter media
• High-efficiency filtration media captures fine dust that outer filters miss
• Works with your existing outer filter for comprehensive engine protection
• Built to handle the airflow demands of Vanguard's high-performance engines

When that inner filter gets loaded with debris or is damaged, you're asking your engine to run on contaminated air—a recipe for premature wear and reduced performance. This Spartan genuine replacement restores the multi-stage filtration system your mower was designed to use.