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EC 402INT Intake Manifold 1.060 HL to Briggs Raptor
402INT EC Intake Manifold 1.060" HL to Briggs Raptor
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EC 402INT Intake Manifold 1.060 HL to Briggs Raptor

Part Number: 402INT
Online Price: $48.99
EC 402INT Billet Intake Manifold – HL 1.060” to Briggs Raptor
Availability: In Stock.

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Description

EC 402INT Billet Intake Manifold – Fits 1.060" HL Tillotson to Briggs Raptor (Model 13)


The Go-To Intake for Limited Modified & Super Stock Flathead Racing


The EC 402INT Intake Manifold is engineered to fit 1.060” Tillotson HL-series carburetors, such as the HL-360-1 EC Dominator, onto the Briggs Raptor (Model 13) flathead engine. This manifold is the standard choice for top-tier Limited Modified and Super Stock flathead classes—used by national winners at events like the Big O, Thanksgiving Thunder, Batesville, Daytona, and many more.


When paired with the HL-360-1 EC Dominator—our most decorated carb in limited modified racing—you get proven podium-level performance and consistent results.


Engineered for Peak Performance

Each EC 402INT is precision CNC-machined from billet aluminum, with port geometry carefully matched to the Raptor Model 13 cylinder head. The result:

  • Seamless airflow through the intake tract
  • No turbulence or misalignment at the port interface
  • Optimized fuel atomization and throttle response
  • Strong and consistent vacuum signal at high RPM

A strategically located pulse hole ensures proper diaphragm operation for Tillotson carbs, delivering reliable fuel metering in demanding race conditions.


Understanding Intake Runner Length

Thinking about tuning power with intake length? Here’s what you should know:

  • Tillotson diaphragm carbs require a strong vacuum pulse to function properly.
  • Longer runners can reduce signal strength, making tuning difficult or inconsistent.
  • Port tuning is a complex science—your carburetor, head, cam timing, and target RPM range all affect the optimal runner length.

The EC 402INT strikes the ideal balance—providing maximum airflow without compromising vacuum signal strength—so you’re race-ready right out of the box.


What’s Included:

  • EC 402INT Billet Intake Manifold
  • Precision pulse fitting
  • Complete installation hardware


Compatibility:

Carburetors:

  • 1.060” Tillotson HL-Series (e.g., HL-360-1 EC Dominator)

Engines:

  • Briggs Raptor Model 13 Flathead

Note: Intake port shapes may vary slightly depending on head type and model.

FAQ

Q1: What carburetors are compatible with the EC 402INT?

A: The 402INT is designed for 1.060” Tillotson HL-series carburetors, especially the HL-360-1 EC Dominator, which is a top performer in Limited Modified and Super Stock racing classes.


Q2: What engines does this intake fit?

A: It is built for the Briggs Raptor (Model 13) flathead engine. The intake ports are CNC-matched for a precise fit and optimal performance.


Q3: Is this intake legal in all racing classes?

A: It is widely used in Limited Modified and Super Stock flathead karting classes. However, always consult your series’ rulebook to verify legality before competition.


Q4: Why is the intake runner length so important?

A: Diaphragm-style Tillotson carbs need a strong vacuum signal to function properly. Excessively long runners can weaken that signal, making the carb harder to tune. The EC 402INT is engineered to maintain a strong signal while maximizing airflow.


Q5: Does this manifold come with everything I need for installation?

A: Yes. The EC 402INT includes:

  • CNC billet manifold
  • Pre-installed pulse fitting
  • All required mounting hardware

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