Intake / Exhaust Valve – Fits Arctic Cat 366, 400, 454, 500 (2x4 / 4x4) – Sold Individually

OVERVIEW

This intake and exhaust valve provides a direct engine rebuild replacement designed to restore cylinder head sealing and maintain reliable compression cycling. Manufactured from specialized heat-resistant steel alloys, the components deliver long-term durability for Arctic Cat 454, 400, 500, and 366 platform servicing.

ENGINEERING & PERFORMANCE

The valve geometry and metallurgy prioritize stable flame-front protection and reduced guide friction, ensuring smoother engine operation under sustained throttle loads. Standard replacements utilize SUH35B heat resistant steel paired with a nitride surface treatment, while performance-oriented variants transition to 21-4N/SUH35HT stainless steel with swirl-polished crowns and treated stems. These material choices prevent thermal degradation and warping, allowing the parts to serve as direct, drop-in top-end refreshes without custom machining.

KEY FEATURES

• Individual intake or exhaust valve selection available
• Standard SUH35B heat resistant steel construction for OEM-level sealing
• 21-4N/SUH35HT stainless steel core designated for performance builds
• Nitride surface finish applied to limit oxidation and extend cycle life
• Swirl polished head and smooth stem processing optimizes airflow efficiency
• Forged Stellite-Tipped valve stems engineered for extreme RPM endurance
• Manufactured under ISO 9001 certified quality control protocols
• Made in Taiwan with direct aftermarket replacement specifications

TECHNICAL SPECIFICATIONS

• Part Name: Intake / Exhaust Valve
• Component Type: Engine Valve
• Base Material: SUH35B Heat Resistant Steel / 21-4N Stainless Steel
• Supported Years: 1996–2011
• Compatible Trims: 2x4 / 4x4

FITMENT

• Arctic Cat 454 (1996–1998) – 2x4 / 4x4
• Arctic Cat 400 (1998–2010) – 2x4 / 4x4
• Arctic Cat 500 (1998–2009) – 2x4 / 4x4
• Arctic Cat 366 (2008–2011) – 4x4

WHY RIDERS CHOOSE THIS

Buillers select these valves to quickly address worn guide clearance and compromised seat integrity without committing to a full cylinder head overhaul. The availability of both budget-friendly nitride-coated steel models and reinforced stainless variants lets mechanics dial in durability based on whether the machine runs stock mapping or sees aggressive trail use. Smooth stem treatments and precise crown geometries minimize oil accumulation and aerodynamic drag inside the port, which directly improves throttle response and reduces top-end overheating. This targeted design approach keeps every affected Arctic Cat platform running closer to factory output across multiple generations.