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EC 31mm Stainless Steel 5mm Standard Length Valves for WC946 Cylinder Head
EC 31mm Stainless Steel Valve with 5mm Stem
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EC 31mm Stainless Steel 5mm Standard Length Valves for WC946 Cylinder Head

Part Number: R-48
Online Price: $20.99
EC 31mm Stainless Steel Intake Valve – 5mm Stem, Stock Length for WC946 & Non-Hemi Heads
Availability: In Stock.

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Description

EC 31mm Stainless Steel 5mm Standard Length Intake Valve – High-Performance Upgrade for WC946 and Modified Non-Hemi Heads


Upgrade your engine’s airflow and reliability with the EC 31mm Stainless Steel Intake Valve, specifically engineered for the WC946 Cylinder Head and modified Non-Hemi-style heads. Built for performance and precision, this valve is ideal for high-output racing applications where durability, flow, and strength matter most.


Key Features:

  • Head Diameter: 31.1mm – Increased intake flow for improved combustion efficiency
  • Stem Diameter: 5mm – Designed to fit heads with 5mm valve guides
  • Standard Length: 2.525” – Direct stock-length replacement
  • Material: High-grade stainless steel for corrosion resistance and heat durability

This 31mm valve is a performance-focused upgrade commonly used as the intake valve on the Wildcat WC946 Cylinder Head, and it’s compatible with most aftermarket and modified Non-Hemi clone-style heads. The larger 31mm head helps optimize intake airflow, increasing volumetric efficiency and horsepower potential—especially in engines with ported heads, upgraded cams, and higher lift rocker arms.


Whether you’re building a competition go-kart, Jr. dragster, or a high-revving mini bike, EC’s 31mm Stainless Steel Valve delivers the strength and reliability needed for demanding 4-cycle racing environments.


Ideal For:

  • WC946 Cylinder Head
  • Modified Non-Hemi Heads (Predator 212 Non-Hemi, Tillotson 212/225R, and other clones)
  • Racing applications using methanol or gasoline
  • High-flow performance builds requiring oversized intake valves

FAQ

Q1: What engines does this 31mm valve fit?
A: It’s designed for the Wildcat 240RS WC946 Cylinder Head and modified Non-Hemi-style heads with 5mm valve guides, such as Tillotson 212/225R, Predator 212 Non-Hemi, and other clone variants.


Q2: Is this valve for intake or exhaust?
A: The EC 31mm valve is intended for use as an intake valve due to its larger diameter, which supports increased airflow into the combustion chamber.


Q3: Can I use this with a stock camshaft and rockers?
A: While it may fit, the larger valve head is best suited for engines with upgraded camshafts, higher lift rockers, and performance cylinder heads to fully benefit from the increased flow.


Q4: Do I need to modify my head to use this valve?
A: If you're using the WC946 head, no modification is needed. For other heads, valve seat work or chamber reshaping might be required to ensure proper fit and sealing.


Q5: Does this valve work with titanium retainers and lash caps?
A: Yes, it is compatible with common high-performance valve train components, including titanium retainers and lash caps, as long as proper clearances and spring pressures are maintained.


Q6: Is this valve suitable for methanol engines?
A: Absolutely. The stainless steel construction offers excellent resistance to the corrosion effects of methanol, making it a great fit for alcohol-fueled race engines.

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