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XR-25 Intake Manifold for Limited Clone Engines
494INT EC billet intake manifold for XR-25 carburetor
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XR-25 Intake Manifold for Limited Clone Engines

Part Number: 494INT
Online Price: $55.00
494INT EC Billet Intake Manifold for XR-25 Carburetor – 208cc Limited Clone Racing
Availability: In Stock.

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Description

494INT EC Billet Intake Manifold for XR-25 Carburetor – Honda GX200, Clone, Tillotson, Wildcat & Predator Engines


Engineered specifically for 208cc Limited Clone racing, the 494INT EC Billet Intake Manifold is precision CNC-machined to maximize airflow, improve carburetor signal, and deliver consistent power across the RPM range. Designed to pair perfectly with the XR-25 Billet Carburetor, this manifold is optimized for Honda GX200-style factory cast heads used in Limited Modified kart racing.


Unlike generic intake manifolds, the 494INT EC is designed around the unique airflow characteristics and pulse requirements of diaphragm carburetors. Every dimension—from the intake runner to the pulse port location—is carefully engineered to improve fuel metering, throttle response, and high-RPM performance.


Whether you're competing in 208cc Limited Clone, AKRA, NKA, or local Limited Modified classes, this manifold provides the airflow and carburetor signal needed to maximize performance while remaining compatible with factory cast cylinder heads.


Precision CNC Machined for Maximum Performance

Every 494INT EC Intake Manifold is CNC-machined from premium aluminum to provide exceptional accuracy, repeatability, and port alignment.

The intake opening is specifically matched to factory cast Honda Clone cylinder heads and the XR-25 Billet Carburetor, reducing airflow disruption while promoting smooth, efficient air/fuel delivery.


Designed for the XR-25 Billet Carburetor

The manifold was developed around the XR-25 Billet Carburetor to maximize carburetor signal and throttle response throughout the usable RPM range.

The carefully engineered runner length and cross-sectional area help produce:

  • Stronger carburetor signal
  • Improved throttle response
  • More consistent fuel metering
  • Better acceleration off the corner
  • Increased top-end power


Optimized Pulse Port Location

The pulse port is strategically positioned to provide a stronger and more stable vacuum signal to diaphragm carburetors.

A properly designed pulse system helps maintain consistent fuel delivery during rapid acceleration and sustained high-RPM operation—critical for competitive kart racing.


Built for 208cc Limited Clone Racing

The 494INT EC Intake Manifold is ideal for:

  • 208cc Limited Clone Engines
  • Limited Modified Clone Engines
  • Honda GX200-Based Racing Engines
  • Predator-Based Racing Builds
  • Tillotson Racing Engines
  • Wildcat Racing Engines
  • Ducar Clone Engines

Designed for racers looking to maximize the performance of the popular XR-25 Billet Carburetor while maintaining compatibility with factory cast cylinder heads.


Why Intake Manifold Design Matters

An intake manifold does much more than connect the carburetor to the cylinder head.

Runner length, cross-sectional area, taper, and pulse location all influence:

  • Airflow velocity
  • Fuel atomization
  • Carburetor vacuum signal
  • Torque production
  • Peak horsepower
  • RPM power curve

Longer isn't always better.

While increasing intake runner length can shift power to different RPM ranges, excessive length can weaken the vacuum signal required by diaphragm-style carburetors like the XR-25. Poor signal reduces fuel metering consistency and can negatively impact throttle response and overall performance.


The 494INT EC was designed to provide an excellent balance between airflow efficiency, carburetor signal, and packaging constraints commonly found on kart racing chassis.


Features

  • Precision CNC-machined billet aluminum construction
  • Optimized for XR-25 Billet Carburetor
  • Port matched for factory Honda GX200-style cast heads
  • Improved airflow and fuel mixture quality
  • Optimized pulse port location for stronger carburetor signal
  • Increased throttle response
  • Better high-RPM fuel delivery
  • Complete installation hardware included
  • Designed specifically for 208cc Limited Clone racing


Engine Compatibility

Fits Honda GX200-style factory cast cylinder heads including:

  • Honda GX200
  • 196cc Clone Engines
  • Predator 212
  • Tillotson 212
  • Wildcat 223
  • Ducar Clone Engines
  • 208cc Limited Clone Engines
  • Limited Modified Racing Engines

Compatible with:

  • XR-25 Billet Carburetor
  • Does not fit Original Tillotson-style diaphragm carburetors using the same mounting pattern


What's Included

  • 494INT EC CNC Billet Intake Manifold
  • Complete Mounting Hardware

FAQ

What carburetors is the 494INT EC Intake Manifold designed for?

The manifold is specifically engineered for the XR-25 Billet Carburetor and not compatible with original Tillotson-style diaphragm carburetors.


What racing classes is this intake manifold designed for?

It was developed primarily for 208cc Limited Clone and Limited Modified kart racing classes using factory cast Honda-style cylinder heads.


Will this fit a Predator 212 engine?

Yes. It fits Predator 212 engines using a factory-style cast cylinder head and the appropriate diaphragm carburetor setup.


Does the manifold fit Honda GX200 cylinder heads?

Yes. It is CNC-machined to match Honda GX200 and other factory cast Honda clone cylinder heads for excellent port alignment.


Why is pulse port location important?

The pulse port supplies the vacuum signal that operates a diaphragm carburetor. Proper placement helps maintain consistent fuel delivery, especially during rapid throttle changes and high-RPM racing.


Does a longer intake manifold always make more power?

No. While intake length influences the RPM where power is produced, excessive runner length can weaken the carburetor signal, reducing fuel metering accuracy and throttle response. The 494INT EC is designed to balance airflow and pulse signal for optimal overall performance.


Is this manifold CNC-machined?

Yes. Every manifold is precision CNC-machined from billet aluminum for consistent dimensions, improved airflow, and excellent fitment.


Does installation hardware come with the manifold?

Yes. The manifold includes the necessary mounting hardware for installation.


Is this manifold suitable for competitive kart racing?

Yes. The 494INT EC is designed specifically for competitive kart racing applications where throttle response, carburetor signal, and airflow efficiency are critical to performance.

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