Bronco OEM‑Style Foam Air Filter for Arctic Cat 366 / 400 / 450 / 500 & Honda TRX450R (2004‑2025)

OVERVIEW

Designed for reliable engine protection and consistent intake breathing, this air filter delivers routine maintenance replacement that matches original equipment performance standards. Constructed from a one-stage synthetic foam element with integrated sealing geometry, it traps abrasive particulates while allowing optimized volumetric airflow. Precision-indexed for direct mounting on Arctic Cat ATVs and the Honda TRX450R, it restores proper filtration without modification.

ENGINEERING & PERFORMANCE

The single-layer foam matrix maintains stable pressure differential across varying throttle positions while capturing dust, silica, and trail debris before internal components are exposed. Reinforced cellular structure resists compression degradation and retains shape under sustained vibration and thermal cycling. Factory-matching dimensions ensure immediate particulate capture upon initial operation, preventing dry-start ingestion risks. Model-specific outer contours align securely with stock intake housings for quick, tool-free installation and removal.

KEY FEATURES

• OEM-type one-stage foam filter architecture
• Direct factory replacement air filter element
• Cross-references Arctic Cat OEM part #3313-378
• Balanced for strong airflow alongside dependable filtration
• Synthetic foam construction designed for extended service intervals
• Stainless steel-compatible inner core prevents corrosion exposure
• Streamlined drop-in installation compatible with factory brackets
• Rated for light trail, utility hauling, and daily recreational use

TECHNICAL SPECIFICATIONS

• Brand: Bronco
• Part Name: OEM-Style Foam Air Filter
• Filter Type: Air Filter (Foam Element)
• Construction Material: One-stage synthetic foam
• Supported Years: 2004–2025
• Compatible Trims: Arctic Cat Alterra (400/450/500), XC (450/450i), 366, 425; Honda TRX450R

FITMENT

• Arctic Cat Alterra 400 (2016–2017)
• Arctic Cat Alterra 450 (2016–2022)
• Arctic Cat Alterra 500 (2017)
• Arctic Cat XC 450 (2010–2016)
• Arctic Cat XC 450i (2010–2014)
• Arctic Cat 366 4x4 Auto SE (2009–2011)
• Arctic Cat 425 (2011)
• Honda TRX450R (2004–2005)

WHY RIDERS CHOOSE THIS

Riders trust this Bronco foam filter because it replicates stock intake geometry while delivering consistent particulate capture across muddy, dusty, and high-dust trail environments. The dense open-cell media blocks abrasive contaminants without restricting cylinder washing flow, preserving optimal power delivery and reducing wear on critical moving parts. Sealed-edge design guarantees a tight fit against aluminum intake walls, eliminating unfiltered bypass gaps that compromise engine longevity. This straightforward blend of precise fitment and proven filtration chemistry makes it a dependable restoration component for daily machine upkeep.