Get the perfect balance of street drivability and performance with CB Performance’s Dual Weber 40mm IDF Carburetor Kit. Ideal for mild to moderate engine builds, this kit delivers smooth throttle response, reliable tuning, and increased horsepower — all in a package designed for everyday street use or spirited weekend driving.

The GENUINE Weber 40 IDF (Spain) is truly the mileage champ. 40 IDF carburetors are factory equipped with 28mm venturis that help provide a terrific combination of fuel economy and performance. Smaller 1600cc and 1776cc engines will benefit from the increased port velocity and enhanced engine torque produced by Weber 40 IDF carburetors.

Weber IDF kits will fit neatly under the engine deck lid of VW sedans, buses, and square/notch backs. Top-quality USA-Made components including our 356 Aluminum Alloy Manifolds, Air Filter Assemblies and Porsche Style Cross Bar Linkage provide exact throttle control and maintain adjustments between service points. Kits are available to fit a variety of Dual Port VW and Porsche applications. See complete list of kit components below.

Not sure which size kit is best for your application – contact our sales team for expert advice before your purchase.

Key Features

• GENUINE Weber IDF Carburetors – Manufactured in Spain – No cheap knockoffs here. Built for precision, reliability, trusted by VW enthusiasts worldwide.
• Complete Installation Kit – Includes high-flow manifolds, hex-bar linkage, cleanable air filter assemblies, gaskets, fuel line, and all hardware needed for a trouble-free bolt-on install.
• Optimized for Street Performance – Perfect match for stock to mild performance engines running dual-port heads.
• Improved Airflow and Throttle Response – Crisp acceleration and smooth power delivery across the RPM range.