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Stock Steel Push Rod for Honda GX390 & Big Block Clone Engines
188F-13008-A GX390/420 Clone Push Rod
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Stock Steel Push Rod for Honda GX390 & Big Block Clone Engines

Part Number: 188F-13008-A
Online Price: $2.99
Stock Push Rod for Honda GX390 & Clone Engines – 145.4mm Steel (Wedge / Non-Hemi)
Availability: In Stock.

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Description

Stock Steel Push Rod for Honda GX390 & Big Block Clone Engines (Wedge / Non-Hemi Heads)


This OEM-style steel push rod is designed to fit most Honda GX390 and GX390-style Big Block Clone engines with Wedge (non-Hemi) cylinder heads. It's ideal for stock or lightly modified engines where factory dimensions still apply.


Please note: Some larger displacement engines (like 440cc and 460cc) may require longer push rods due to increased deck height. Always verify your required push rod length before ordering—especially when working with modified engine components.


Key Features

  • Compatible with most GX390 and Big Block Clone Wedge-style heads
  • Precision-machined steel construction for durability
  • Designed for stock valve train geometry
  • Ideal for use with OEM or mild performance builds


Push Rod Specifications

  • Stem Diameter: 5mm (0.196")
  • Ball End Diameter: ~6mm (0.2345")
  • Overall Length: 145.4mm (5.724")
  • Weight: ~16.3g


Important Fitment Notes

In modified engines, stock push rods may no longer be the correct length or strength. You may need aftermarket push rods if any of the following changes have been made:

Length-related Modifications:

  • Block or cylinder head decking
  • Use of thinner or thicker head gaskets
  • Changes in camshaft base circle diameter
  • Rocker geometry alterations (e.g. high-lift cams, rocker arm ratio changes)
  • Use of longer valves

Strength & Durability Needs:

  • Stiffer valve springs
  • Higher lift camshafts
  • Higher RPM operation

FAQ

Q1: What engines does this push rod fit?
A: This push rod fits most Honda GX390, Predator 420, and Big Block Clone engines that use Wedge-style (non-Hemi) cylinder heads. It’s designed for stock valve train geometry.


Q2: What are the specifications of the push rod?
A:

  • Stem Diameter: 5mm (0.196")
  • Ball End Diameter: ~6mm (0.2345")
  • Length: 145.4mm (5.724")
  • Weight: ~16.3g
  • Material: Steel


Q3: Will this push rod fit a 440cc or 460cc engine?
A: Not necessarily. Larger displacement engines often have taller deck heights and may require longer push rods. Always measure your current push rod length or check with your engine builder before ordering.


Q4: When would I need to upgrade to aftermarket push rods?
A: You may need aftermarket push rods if you've made changes like:

  • Decking the head or block
  • Using thinner or thicker head gaskets
  • Changing valve length
  • Installing a different camshaft
  • Running higher lift or stiffer valve springs
  • Operating at high RPMs
    These changes can affect geometry, length, and load requirements.


Q5: Can I reuse stock push rods after a rebuild?
A: Yes, if they are undamaged and straight, stock push rods can be reused in unmodified engines. However, if you're rebuilding with upgraded parts or adjusting geometry, check that stock length still applies.

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