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EC 25mm Stainless Steel 5mm Valves for Tillotson/Predator Non-Hemi
EC 27mm Stainless Steel Valve with 5mm Stem
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EC 25mm Stainless Steel 5mm Valves for Tillotson/Predator Non-Hemi

Part Number: R-35
Online Price: $20.99
25mm Stainless Steel 5mm Stem Valve for the Predator 212 Non-Hemi, Tillotson 212R and Tillotson 225 Cylinder Heads
Availability: Out of Stock.

Description

EC 5mm Stem - 25mm Stainless Steel Performance Valves for Tillotson 212R, 225RS & Predator 212 Non-Hemi Cylinder Heads


Upgrade your small engine's valvetrain with EC 5mm Stem 25mm Stainless Steel Valves, engineered specifically for Tillotson 212R, 225RS, and Predator 212 Non-Hemi cylinder heads. These high-performance valves are designed to outperform factory components by reducing weight, increasing airflow, and handling the demands of high-RPM racing engines.


Developed in response to the lack of aftermarket 5mm valves for these platforms, our stainless steel valves are the ultimate solution for performance builds. They are built to handle higher spring pressures, RPMs, and valve lift, making them ideal for racers and performance enthusiasts seeking maximum power and reliability.


Key Features & Performance Benefits:

  • Lightweight 5mm Stem Design:
    Reduces reciprocating mass for improved valvetrain stability, quicker throttle response, and the ability to run higher RPMs with lower spring pressure.
  • Enhanced Airflow with 25mm Head:
    The 25mm stainless steel valve offers superior flow characteristics compared to stock 25mm exhaust valves, improving combustion efficiency and horsepower output.
  • Nitrided for Durability:
    Treated with a nitrided finish on both the valve head and stem, these valves offer superior heat resistance and wear protection, ensuring long-term reliability in high-compression and high-temperature conditions.
  • Extended Length for High-Lift Cams:
    At +0.130” longer than stock, these valves provide an additional +0.050” valve spring install height, allowing compatibility with high-lift camshafts while avoiding coil bind and maintaining proper spring preload.
  • Optimized for High-Performance Builds:
    These valves are perfect for engine builders looking to maximize efficiency, airflow, and durability in Predator Non-Hemi and Tillotson race engines.


Valve Specifications:

  • Head Diameter: 0.983" (25mm)
  • Stem Diameter: 0.1945" (5mm)
  • Overall Length: 2.650"
  • Weight: 20.1g


Engine Compatibility:

These performance valves are designed for use with 5mm valve guides in the following non-hemi cylinder heads:

  • Predator 212 Non-Hemi
  • Tillotson 212R
  • Tillotson 225RS
  • Wildcat WC946


Boost your engine's potential with EC’s 5mm Stem 25mm Stainless Steel Valves—purpose-built for durability, high-RPM stability, and maximum flow performance. Whether you're drag racing, karting, or building a high-performance mini bike, these valves are a must-have upgrade.

FAQ

What makes the EC 5mm stem 25mm stainless valves better than stock?

These valves feature a lighter 5mm stem that reduces reciprocating weight, enabling higher RPMs and improved valvetrain stability. The 25mm stainless head also offers better airflow and durability than OEM valves.


Will these valves work with stock valve guides?

Yes, these valves are designed for use with 5mm valve guides. If you're running 5.5mm guides, you'll need to upgrade to 5mm guides to use these valves.


Can I run these valves with a high-lift camshaft?

Yes, the valves are +0.130" longer than stock, giving you an additional +0.050" install height, making them compatible with high-lift cams while preventing coil bind.


Are these valves compatible with the Predator 212 Hemi head?

No, these valves are specifically designed for Non-Hemi Predator 212, Tillotson 212R, 225RS, and Wildcat WC946 cylinder heads with 5mm guides.


Do the valves come pre-treated for durability?

Yes, both the valve stem and head are nitrided for enhanced heat resistance and wear protection, making them ideal for high-compression and high-RPM racing engines.

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