Honda TRX300EX TRX250X FourTrax intake exhaust engine valve Choose (Sold Each)

OVERVIEW

This intake and exhaust valve kit provides essential engine replacement components for rebuilding or maintaining Honda FourTrax engines. Manufactured from durable SUH35B heat-resistant or 21-4N stainless steel, these OEM-style valves are designed to restore proper sealing and compression for long-term reliability.

ENGINEERING & PERFORMANCE

Built using high-grade SUH35B steel or 21-4N/SUH35HT stainless alloy, these valves resist high heat, corrosion, and mechanical wear better than standard stock components. The smooth stem treatment and available swirl polish ensure efficient rotation and minimize friction within the cylinder head. Whether selected as standard performance or high-performance Stellite-tipped variants, they maintain precise geometries and tolerances to prevent blowdown and support consistent engine operation over extended use.

KEY FEATURES

• Engine component type: Intake and Exhaust Valves (Sold Individually)
• Complete Kit / Set Option: Available as a set of two (one intake, one exhaust)
• OEM replacement design for accurate factory fitment
• Constructed from durable SUH35B heat-resistant steel
• Optional high-performance valves made with 21-4N/SUH35HT stainless steel
• Fil Nitrile finish for enhanced durability and corrosion resistance
• Swirl polished and treated stems for smoother operation
• Stellite-Tipped stems available on high-performance models
• ISO 9001 certified manufacturing processes
• Made in Taiwan

TECHNICAL SPECIFICATIONS

• Brand: Aftermarket OEM Replacement
• Part Name: Engine Valve Kit
• Component Type: Valve
• Material: SUH35B Heat Resistant Steel / 21-4N Stainless Steel
• Supported Years: 1987–2009
• Compatible Trims: TRX300EX, TRX250X

FITMENT

• Honda TRX300EX (1993–2009) • Honda TRX250X (1987–1992)

WHY RIDERS CHOOSE THIS

Riders rely on these valves because they offer direct OEM dimensions while upgrading material integrity to withstand harsh riding conditions. The heat-resistant SUH35B construction protects against warping, while optional stainless steel variants provide superior endurance for aggressive usage. By selecting between a single replacement or a matched pair, mechanics ensure perfect combustion sealing, which restores power, prevents excessive oil consumption, and extends the lifespan of rebuilt or aging ATV engines.