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Rubber Valve Cover Gasket for Honda GX390 & Big Block Clone Wedge (Non-Hemi) Heads
188F-11011-A GX390/420 Clone Valve Cover Gasket
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Rubber Valve Cover Gasket for Honda GX390 & Big Block Clone Wedge (Non-Hemi) Heads

Part Number: 188F-11011-A
Online Price: $3.85
Rubber Valve Cover Gasket for GX390 & Big Block Clone Wedge (Non-Hemi) Heads
Availability: In Stock.

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Description

Rubber Valve Cover Gasket for Honda GX390 & Big Block Clone Wedge (Non-Hemi) Heads


Ensure a tight, leak-free seal between the valve cover and cylinder head with this Rubber Valve Cover Gasket, designed specifically for Honda GX390-style engines and Big Block Clones featuring Wedge-style (non-Hemi) heads with single-bolt valve covers.


This gasket is ideal for engines that use a single central bolt to secure the valve cover—commonly found on Predator 420 and other GX390-based clone engines with Wedge-style heads. It provides reliable sealing for high-vibration applications and helps prevent oil leaks that can affect performance and engine longevity.


Key Features

  • Designed for single-bolt valve covers found on Wedge (non-Hemi) GX390-style heads
  • Durable rubber construction for long-lasting, oil-resistant sealing
  • Compatible with most GX390-based clone engines, including Predator 420 (Wedge-style)
  • Helps prevent oil leaks and maintain proper valve cover sealing


Does Not Fit:

  • Wildcat 460 cylinder heads with 4-bolt valve covers
  • Hemi-style cylinder heads with a rounder combustion chamber design and a different valve cover bolt pattern


Compatibility

  • Fits most Honda GX390Predator 420, and Big Block Clone engines equipped with Wedge (non-Hemi) heads and single-bolt valve covers
  • Check the valve cover bolt pattern before purchasing

FAQ

Q1: What type of valve covers is this gasket compatible with?
A: This gasket fits single-bolt valve covers, where one bolt passes through the center of the valve cover and threads into the cylinder head between the rocker arms. It is commonly used on Wedge (non-hemi) style GX390 and clone heads.


Q2: Which engines does this gasket fit?
A: It fits most Honda GX390-style and Big Block Clone engines, including the Predator 420, as long as they have Wedge-style (non-Hemi) heads and use a single-bolt valve cover.


Q3: Will this gasket fit my Wildcat 460 or Hemi-style engine?
A: No. This gasket is not compatible with:

  • Wildcat 460 engines with 4-bolt valve covers
  • Hemi-style heads, which have a different combustion chamber design and bolt pattern


Q4: What is the gasket made from?
A: The gasket is made from durable, oil-resistant rubber, designed to provide a leak-proof seal under high temperatures and vibration conditions.


Q5: How do I know if my engine has a Wedge (non-Hemi) head?
A: Wedge heads have a flatter combustion chamber and use a single bolt in the valve cover. Hemi heads typically have a rounder chamber and multiple bolts securing the valve cover. Checking your valve cover bolt pattern is the easiest way to tell.

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