Talk to a performance expert

615.446.6807

mon-thurs 9-5 cst

  1. Home
  2. Carburetors
  3. Carburetor Intake, Manfold and Adaptors
  4. Briggs Animal & World Formula Intake Manifold
  5. EC 443INT EC Intake Manifold 1-Inch HL to Briggs Animal
EC 443INT EC Intake Manifold 1-Inch HL to Briggs Animal
443INT EC Intake Manifold 1.00" HL to Briggs Animal
Write a Review

EC 443INT EC Intake Manifold 1-Inch HL to Briggs Animal

Part Number: 443INT
Online Price: $48.99
EC 443INT Billet Intake Manifold – For 1.00" HL Carburetors on Briggs Animal
Questions about this item? Be the first to ask here.
Availability: In Stock.

Send to:

*We'll ask for shipping info at checkout

Description

EC 443INT Billet Intake Manifold – 1.00” Tillotson HL to Briggs Animal


Purpose-Built for Briggs Animal Limited Modified Racing

The EC 443INT Billet Intake Manifold is engineered to adapt 1.00” Tillotson HL-series carburetors—including the race-proven HL-304WX-11 EC Dominator—to the Briggs Animal (Model 12) cylinder head. This manifold is ideal for Limited Modified classes and select open class builds using cast heads. (Note: Not compatible with Briggs World Formula heads.)


Whether you're building for consistency or chasing podiums, the 443INT delivers the precision airflow, fuel signal strength, and performance tuning needed to win at the track.


Why Racers Choose the HL-304WX-11 EC Dominator

  • The winningest 1.00” OHV carburetor in Limited Modified racing
  • Tuned for superior atomization and throttle response
  • Optimized for methanol and designed specifically for OHV platforms
  • Built to deliver consistent performance across changing track conditions

When paired with the EC 443INT intake, this combo offers unmatched throttle response and tuning stability.


Precision Fitment, Race-Ready Performance

Each EC 443INT manifold is CNC-machined from billet aluminum to match the exact intake port shape of the Briggs Animal Model 12 cylinder head. This ensures:

  • Perfect port alignment—no turbulence, no mismatch
  • Smooth laminar airflow for increased power and efficiency
  • Consistent vacuum signal with precisely located pulse port
  • Reliable diaphragm carb operation at high RPMs

The result? A race-ready intake system that maximizes your engine’s breathing and fuel delivery—critical for high-output performance on methanol.


Understanding Intake Length & Tuning

Thinking about modifying the intake runner length to tune your powerband? Here's what matters:

  • Diaphragm-style Tillotson carbs require a strong intake pulse to function.
  • Longer runners weaken this signal, hurting carb performance and tuning range.
  • True intake tuning involves balancing cam timing, port shape, valve size, and carb specs—and often yields minimal gains without proper test equipment.

The EC 443INT is designed to strike this balance perfectly out of the box, making it a plug-and-play choice for serious racers.


What’s Included

  • EC 443INT Billet Intake Manifold
  • Precision-machined pulse fitting
  • Complete mounting hardware


Compatibility

Carburetors (1.00” HL-series):

  • Tillotson HL-304WX-11 EC Dominator
  • Other 1” Tillotson HL-series carburetors

Engine Platform:

  • Briggs Animal (Model 12)

Not compatible with Briggs World Formula heads

For larger valve heads or 1.125” carburetors, consider the EC 441INT or EC 442INT intake manifolds.



FAQ

Q1: What engines does the EC 443INT intake manifold fit?

A: The EC 443INT fits the Briggs Animal (Model 12) engine and is primarily used in Limited Modified kart racing. It does not fit Briggs World Formula cylinder heads.


Q2: Which carburetors are compatible with the EC 443INT?

A: This manifold is designed for 1.00” Tillotson HL-series carburetors, such as the HL-304WX-11 EC Dominator and other similar 1” HL carbs used in open and limited modified classes.


Q3: What makes this intake manifold race-ready out of the box?

A: The 443INT is CNC-machined for precise port alignment and comes with a properly located pulse port to ensure strong vacuum signal. It includes all required mounting hardware, making it plug-and-play for most race builds.


Q4: Why is intake runner length important in diaphragm carb tuning?

A: Diaphragm carbs like the HL-series need a strong vacuum pulse. Longer intake runners weaken this signal, leading to sluggish response or inconsistent tuning. The 443INT is optimized to maintain strong pulse strength while maximizing airflow.


Q5: Can I use this with cast cylinder heads?

A: Yes. The EC 443INT works well with cast heads, which are common in limited modified classes. It is designed to match the intake port shapes of most Briggs Animal cast heads.


Q6: What’s the difference between the EC 443INT and EC 441INT?

A: The EC 443INT is for 1.00” HL carburetors, typically used in limited modified classes. The EC 441INT is for 1.125” HL carburetors, suited for open-class engines with big valve heads.

Related Items

EC 441INT EC Intake Manifold 1.125 HL to Briggs Animal
EC 441INT EC Intake Manifold 1.125 HL to Briggs Animal
$49.95
In Stock.
Add To Cart
EC 456INT EC Intake Manifold 1.125 HL to Briggs World Formula
EC 456INT EC Intake Manifold 1.125 HL to Briggs World Formula
$48.99
In Stock.
Add To Cart
Billet Intake 28mm Slide Carburetor Adapter for Briggs Animal / LO206 Engines
Billet Intake 28mm Slide Carburetor Adapter for Briggs Animal / LO206 Engines
$41.99
In Stock.
Add To Cart

Recently Viewed Items