EC 448INT Intake Manifold 1-Inch HL to Clone/Honda/Predator

EC 448INT Billet Intake Manifold – Fits 1.00" HL Tillotson to Honda GX200 / Clone Engines

Versatile Performance Intake for Super Stock & Modified Clone Builds

The EC 448INT Intake Manifold adapts 1.00” Tillotson HL-series diaphragm carburetors—like the popular HL-304WX—to a wide range of small engine platforms, including the Honda GX200, Predator 212/224, and other 196–268cc Clone-style engines. It’s the ideal solution for racers running anything from Super Stock builds to open modifieds with cast cylinder heads.

Recommended Setup: Pair the 448INT with the HL-304WX (designed by EC Carburetors and built by Tillotson) for class-leading power in 208cc Limited Clone and similar racing categories.

Fits These Carburetors & Engines:

Compatible Carburetors (1.00” throttle bore):

• HL-304WX
• HL-334
• Can be ported for 1.060” HL carbs like the HL-360

Engine Platforms:

Honda GX200 / Clone 196cc

• Predator 212 / Predator 224 Non-Hemi
• Tillotson 196cc – 268cc
• Ducar 196 / 212 / 224
• Wildcat 223 / 240
• Ghost 212

Note: Cylinder head port shapes may vary slightly by brand. Some heads may require light port matching for optimal alignment and flow.

CNC-Machined for Seamless Flow & Vacuum Signal Strength

Crafted from high-grade billet aluminum, the EC 448INT is precision CNC-machined to match each engine’s intake port geometry. This eliminates turbulence and ensures:

• Laminar airflow through the intake tract
• Perfect port-to-manifold alignment
• Accurate fuel atomization
• Strong vacuum signal for responsive throttle performance

The pulse hole is carefully placed to ensure maximum diaphragm pumping action at high RPM—essential for reliable fuel delivery with HL-series Tillotson carburetors.

Intake Runner Length & Tuning Considerations

If you're experimenting with intake length for powerband tuning, keep in mind:

• Diaphragm carburetors like the Tillotson HL rely on a strong, sharp vacuum pulse.
• Longer runners weaken the signal, which can hinder fuel metering and throttle response.
• True port tuning involves a complex relationship between runner length, cam timing, valve size, and carb geometry.

Unless you have the tools and time to test and dyno different configurations, we recommend using the EC 448INT as-is—engineered for the best balance of airflow and signal strength out of the box.

What’s Included:

• EC 448INT Billet Intake Manifold
• Machined pulse fitting
• Complete mounting hardware