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EC 27mm Stainless Steel 5mm Valves for Evolution Cylinder Head
EC 27mm Stainless Steel Valve with 5mm Stem
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EC 27mm Stainless Steel 5mm Valves for Evolution Cylinder Head

Part Number: R-41
Online Price: $22.99
fits EC Evo Exhaust
Availability: In Stock.

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Description

27mm Stainless Steel Exhaust Valve – 5mm Stem for EC Evolution Cast Cylinder Head


This 5mm stem, 27mm stainless steel exhaust valve is a direct OEM replacement for the EC Evolution Performance Cast Cylinder Head—a high-performance head designed by EC Carburetors for Honda GX200/Clone-style engines, including Ducar, Tillotson, Wildcat, and Predator small blocks.


The Evolution head bridges the performance gap between traditional cast heads and full billet heads by offering larger ports and oversized valves. This 27mm valve is part of that system, engineered for strength, flow, and durability under high-RPM racing conditions. Made from premium stainless steel, it offers exceptional resistance to heat, wear, and warping—ideal for kart racing, mini bikes, and performance engines pushing the limits.


Whether you're replacing a worn valve or building a new Evolution head, this is the exact spec part to maintain maximum flow and reliability.


Valve Specifications

  • Head Diameter: 1.060" (27mm)
  • Valve Length: 2.868" (72.85mm)
  • Stem Diameter: 0.1955" (5mm)
  • Material: Stainless Steel
  • Weight: 24.2g
  • Application: EC Evolution Performance Cast Head (Exhaust Valve)

FAQ

Q1: What engines is this valve compatible with?

A: This exhaust valve is specifically designed for the EC Evolution Performance Cast Cylinder Head, which fits GX200/Clone engines including Ducar, Tillotson, Wildcat, and Predator 212 small blocks.


Q2: Is this an intake or exhaust valve?

A: This is a 27mm exhaust valve made to match the EC Evolution cylinder head specifications.


Q3: What is the stem diameter and valve length?

A: The valve features a 5mm stem and a total length of 2.868" (72.85mm), making it a direct replacement for Evolution-spec heads.


Q4: What material is this valve made from?

A: It’s made from high-grade stainless steel, ensuring durability, heat resistance, and long-term performance in high-RPM race applications.


Q5: Can this be used with billet heads or non-Evolution cast heads?

A: Not directly, this valve is specifically designed for EC’s Evolution Cast Head. It may not fit properly in billet heads or other cast head models without modification.

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