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

Part Number: R-36
Online Price: $20.99
27mm Stainless Valves 5mm Stem – Tillotson & Predator 212
Availability: In Stock.

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Description

EC 27mm Stainless Steel Valves with 5mm Stems – High-Performance Valves for Tillotson 212R, 225RS, and Predator 212 Non-Hemi Heads

Upgrade your engine with the first-ever 5mm stem, 27mm stainless steel valves engineered specifically for the Tillotson 212R, 225RS, and Predator 212 Non-Hemi cylinder heads.


Why Choose EC’s 5mm Stem Stainless Steel Valves?

When designing the Tillotson 212R cylinder head, we opted for the 5mm valve stem size shared with the Predator 212 Non-Hemi, offering a significant performance edge over traditional 5.5mm stems found in 196cc clones, Honda GX200s, and Hemi Predators. These valves feature a larger 27mm head while being lighter than stock alternatives—ideal for high-RPM performance and aggressive camshaft setups.


The Problem with Stock Valves

Tillotson used the same head casting across the 212R and 225RS engines but retained stock valves, which simply don’t hold up under higher lift cams and stiffer valve springs. For racers running high-lift cams or building stock-appearing class engines, these factory valves pose a major limitation.


The EC Solution

We developed custom stainless steel valves to meet the needs of performance engine builders. With a lighter 5mm stem, these valves reduce valvetrain weight, allowing for higher RPMs with less spring pressure. Their slimmer stems also improve airflow by reducing restriction in the port’s bowl and choke area.

Nitrided for heat and wear resistance, our valves are built to perform in demanding racing environments.


Valve Specifications:

  • Head Diameter: 1.060" / 27mm
  • Stem Diameter: 0.1945" / 5mm
  • Overall Length: 2.654" / 64.5mm
  • Weight: ~21.8g
  • Material: Nitrided Stainless Steel

Note: These valves are approximately 0.130" longer than stock 27mm intake valves, increasing installed height by ~0.050". This improves coil bind clearance but may slightly reduce spring pressure.


Key Benefits:

  • First aftermarket 5mm stem stainless steel valve for Tillotson & Predator 212 Non-Hemi heads
  • Lighter than stock for improved RPM capability and reduced valvetrain stress
  • Enhanced airflow from smaller stem profile
  • Nitrided surface for extended durability under high-heat conditions
  • Optimized for stock-appearing classes and cammed engines


Perfect for kart racers, builders, and performance enthusiasts looking to extract maximum power while maintaining reliability. Whether you’re running a Tillotson 212R, 225RS, or a Predator 212 Non-Hemi, these valves are the upgrade your engine needs.

FAQ

Q1: What engines are these valves compatible with?

A: These 27mm stainless steel valves are designed specifically for the Tillotson 212R, Tillotson 225RS, and Predator 212 Non-Hemi cylinder heads. In many cases, the valve can be used in other modified non-hemi heads.


Q2: What is the advantage of a 5mm valve stem over a 5.5mm stem?

A: A 5mm valve stem is lighter, reducing valvetrain weight and allowing for higher RPM operation with less spring pressure. It also improves airflow by reducing port obstruction.


Q3: Are these valves suitable for stock or modified engines?

A: These valves are ideal for both stock-appearing builds and modified engines with aggressive camshafts and higher spring pressures.


Q4: Do these valves require any head modification to install?

A: These valves are a direct fit for Tillotson and Predator 212 Non-Hemi heads using 5mm guides. Ensure spring height and retainer compatibility due to the increased installed height (~0.050").


Q5: Are the valves heat-treated?

A: Yes, the valves are nitrided on both the head and stem for improved heat resistance and durability under high-stress conditions.

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