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Stock Wedge (Non-Hemi) Cylinder Head for Wildcat 460 & Big Block Clone Engines
Wildcat 460 Cylinder Head - Bare
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Stock Wedge (Non-Hemi) Cylinder Head for Wildcat 460 & Big Block Clone Engines

Part Number: 20023-00049-00
Online Price: $48.95
Stock Wedge Cylinder Head for Wildcat 460 & GX390 Big Block Engines
Availability: Out of Stock.

Description

Stock Wedge (Non-Hemi) Cylinder Head for Wildcat 460 & GX390 Big Block Clone Engines


Restore reliability and performance to your big block build with this stock replacement Wedge (Non-Hemi) cylinder head for Wildcat 460 and GX390-style engines. Designed for durability and proper fitment, this head is ideal for mini bikes, mud motors, go-karts, and off-road buggies running high-torque big block setups.


Whether you're rebuilding a worn engine or replacing a damaged head, this casting provides a solid OEM-style foundation for dependable performance.


Built for Wildcat 460 & Big Block Performance Applications

Unlike many GX390-style heads that use a single-bolt valve cover, the Wildcat 460 platform features a 4-bolt valve cover design. This improved configuration offers:

  • More secure valve cover sealing
  • Increased rigidity under vibration and load
  • Additional clearance around rocker arms and valvetrain components
  • Better reliability for off-road and high-load applications

This makes it especially well-suited for mud motors, mini bikes, and go-kart/buggy engines that see sustained abuse and heavy torque loads.


Bare Head – Build It Your Way

This is a bare cylinder head, allowing you to customize your valvetrain setup based on your application. It is machined for:

  • 35mm intake valve
  • 32mm exhaust valve

(Valves, springs, retainers, seals, studs, and gaskets are NOT included.)

Perfect for builders who want to spec their own components for performance, durability, or racing applications.


Ideal for These Engines & Builds

  • Wildcat 460 engines
  • Honda GX390 and GX390-style clones
  • Predator 420 big block engines
  • Mud motors and off-road utility builds
  • Mini bikes with big block swaps
  • Go-karts and off-road buggies
  • Stock rebuilds or budget performance builds


Key Features

  • OEM-style Wedge (Non-Hemi) combustion chamber design
  • Designed specifically for Wildcat 460 4-bolt valve cover configuration
  • Compatible with GX390 / Predator 420 big block clone platforms
  • Accepts 35mm intake and 32mm exhaust valves
  • Ideal for rebuilds, replacements, or custom engine builds
  • Bare casting allows full valvetrain customization


Why Choose a Wedge (Non-Hemi) Head?

Wedge-style combustion chambers are known for:

  • Strong low-end torque (ideal for mud motors and heavy buggies)
  • Simpler, more durable valvetrain geometry
  • Reliable performance in demanding environments

For utility and off-road applications, the wedge design offers a balance of power, efficiency, and longevity.


Pro Builder Tip

Pair this head with properly matched valves, springs, and a performance camshaft to maximize airflow and torque—especially important for heavy mini bikes, mud motors, and off-road karts.

FAQ

Will this cylinder head fit a Wildcat 460 engine?

Yes, this head is specifically designed for the Wildcat 460 and features the correct 4-bolt valve cover pattern for proper fitment and sealing.


Is this compatible with GX390 or Predator 420 engines?

Yes, this cylinder head is compatible with most GX390-style and Predator 420 big block clone engines. However, always verify your valve cover and mounting configuration before purchasing.


What does “bare cylinder head” mean?

A bare head means it does not include valves, springs, retainers, seals, studs, or gaskets. This allows you to choose and install your own valvetrain components based on your build.


What size valves does this head use?

This head is machined to accept standard 35mm intake and 32mm exhaust valves, which are common for GX390 and similar big block engines.


What is the difference between wedge (non-hemi) and hemi cylinder heads?

A wedge (non-hemi) head uses a more compact combustion chamber that typically produces stronger low-end torque and simpler valvetrain geometry, making it ideal for utility and off-road applications like mud motors and buggies.


Why does the Wildcat 460 use a 4-bolt valve cover?

The 4-bolt valve cover design provides a more secure seal, improved durability under vibration, and better clearance for valvetrain components compared to single-bolt designs.


Is this head good for performance builds or just stock replacement?

This head is ideal for stock replacements but can also be used as a base for performance builds when paired with upgraded valves, springs, and a performance camshaft.


What applications is this cylinder head best suited for?

This head is commonly used in mini bikes, mud motors, go-karts, off-road buggies, and other big block small engine applications where torque and durability are important.

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