Dual Carbs Intake Manifolds, For IDA & EPC Carbs

OVERVIEW

When it comes to squeezing every ounce of horsepower out of your high-performance air-cooled engine, the intake path is where championships are won or lost. These EMPI Dual Carb Intake Manifolds are specifically engineered for the legendary Weber IDA and EMPI EPC series carburetors, providing the heavy-duty foundation needed for serious street or strip applications. Whether you are building a weekend warrior or a dedicated drag racer, these manifolds offer the precise geometry required to deliver a massive air-fuel charge directly into your dual-port cylinder heads. By utilizing a high-offset design, these manifolds ensure that your large-bore carburetors clear the fan shroud while maintaining a straight, high-velocity intake path that minimizes turbulence and maximizes volumetric efficiency. You won''t find a more essential upgrade for a high-displacement engine that demands the massive airflow only an IDA-style carburetor can provide.

Crafted from high-grade cast aluminum, these manifolds are designed with enough material to allow for custom porting to match your specific cylinder head intake runners perfectly. The IDA and EPC carburetors are the gold standard for high-displacement VW engines, and these EMPI manifolds are built to handle the weight and vibration of those substantial carb bodies without cracking or warping under extreme engine bay heat. Sold as a pair, they come ready to transform your Type 1 engine into a high-revving powerhouse. If you are serious about your air-cooled performance, you know that the transition from the carburetor to the head is critical; these manifolds provide the smooth, consistent flow that your race-spec engine demands. At Appletree Automotive, we understand that precision matters, and these EMPI racing manifolds deliver the reliability and performance that VW enthusiasts have trusted for decades.

FITMENT

• Volkswagen Beetle: 1966-1977 (Dual Port Applications)
• Volkswagen Karmann Ghia: 1966-1974 (Dual Port Applications)
• Volkswagen Thing: 1973-1974
• Volkswagen Bus / Type 2: 1963-1971 (With Type 1 Upright Engine)
• Custom Dune Buggies & Sand Rails: All Type 1 Dual Port configurations
• Engine Compatibility: 1600cc to 2332cc+ Type 1 Dual Port Engines
• Carburetor Compatibility: Weber 48 IDA, EMPI EPC 48, and EMPI EPC 51

SPECS

• Part Number: 43-5215-0
• Brand: EMPI
• Material: Heavy-Duty Cast Aluminum
• Port Style: Dual Port Type 1
• Carburetor Mounting Flange: IDA / EPC 3-Bolt Pattern
• Finish: Natural Cast Aluminum
• Included Quantity: 1 Pair (Left and Right Manifolds)
• Application: High-Performance Racing and Street-Strip
• Weight: 5.8 lbs

PRO TIPS

1. Port Matching for Maximum Flow

While these manifolds are ready to bolt on out of the box, the real secret to unlocking their potential lies in port matching. For high-performance builds, you should use a gasket as a template to match the manifold runners to the intake ports on your cylinder heads. This eliminates any "steps" or obstructions that create turbulence. Use a high-speed rotary tool with a carbide burr to smooth the transition. Don''t over-polish the interior walls; a slightly textured surface actually helps keep the fuel atomized rather than puddling on the walls of the manifold.

2. Ensure Perfect Linkage Alignment

IDA and EPC carburetors are massive, and their placement on these manifolds is critical for proper throttle response. When installing your hex-bar or cross-bar linkage, always mock up the manifolds and carburetors first without gaskets to check for clearance against the fan shroud. If the linkage binds even slightly, it can lead to erratic idling or "hanging" RPMs. Ensure that both carburetors reach wide-open throttle at the exact same time to prevent one bank of cylinders from running leaner than the other during high-speed runs.

3. Prevent Vacuum Leaks and Heat Soak

High-performance engines vibrate significantly, which can cause intake nuts to loosen over time. Always use high-quality wave washers or Schnorr washers and check your torque specs after the first few heat cycles. Additionally, because IDA-style carbs sit directly over the cylinder heads, heat soak can become an issue, leading to fuel percolation in the bowls. We recommend using thick phenolic spacers or high-quality gaskets between the manifold and the carburetor to act as a thermal barrier, keeping your fuel charge cool and your throttle response crisp.