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Stock Cast Iron Exhaust Valve Guide for Honda GX390 & Big Block Clones
Stock Cast Iron Exhaust Valve Guide for Honda GX390 & Big Block Clones
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Stock Cast Iron Exhaust Valve Guide for Honda GX390 & Big Block Clones

Part Number: 188F-11201-A
Online Price: $6.95
Exhaust Valve Guide Replacement for Predator 420 & Wildcat 460 Wedge Heads
Availability: In Stock.

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Description

Stock Cast Iron Exhaust Valve Guide – Honda GX390 / Predator 420 / Wildcat 460 (Wedge Heads)


This OEM-style cast iron exhaust valve guide is designed for use in Wedge (Non-Hemi) cylinder heads found on Honda GX390 and most Big Block Clone engines, including Predator 420 and Wildcat 460 models.


Crafted from durable cast iron, this guide offers excellent wear resistance and heat tolerance—ideal for performance builds, rebuilds, or factory replacement applications.


Note: Inside diameter (~6.25mm) must be precision reamed to accept standard 6.5mm valve stems.


Specifications:

  • Overall Length: 37mm (1.459")
  • Outer Diameter: 12mm (0.475")
  • Inner Diameter (pre-reamed): ~6.25mm (0.245")
  • Material: High-durability cast iron
  • Application: Intake valve guide for non-hemi big block cylinder heads
  • Fitment: Honda GX390, Predator 420, Wildcat 460, and similar Wedge-head clones


Key Features:

  • Direct replacement for worn or damaged exhaust valve guides
  • Designed for heat and friction tolerance in high-performance use
  • Compatible with aftermarket or OEM valves (requires finish reaming)

FAQ

Q1: Which engines is this exhaust valve guide compatible with?
A: It fits most Honda GX390 and Big Block Clone engines with Wedge (Non-Hemi) heads, including Predator 420 and Wildcat 460 models.


Q2: What material is this valve guide made from?
A: This exhaust valve guide is made from durable cast iron for excellent wear and heat resistance.


Q3: Does this valve guide require any modification before installation?
A: Yes, the inside diameter is approximately 6.25mm and must be precision reamed to fit the standard 6.5mm exhaust valve stems.


Q4: Can this valve guide be used on Hemi-style heads?
A: No, it is designed specifically for Wedge (Non-Hemi) cylinder heads and is not compatible with Hemi-style heads.


Q5: Is this valve guide a direct replacement for OEM parts?
A: Yes, it is an OEM-style replacement for worn or damaged exhaust valve guides in compatible engines.


Q6: What tools are needed to install this valve guide?
A: A precision reaming tool is required to properly size the guide bore, along with standard installation tools.


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