Weber 40mm IDF Dual Carburetor Kit — 356/912 Flat-Four | Porsche 356 & 912 (44-1291-0)

The real thing — genuine Weber IDF. The Weber 40mm IDF Dual Carburetor Kit (44-1291-0) is the performance induction upgrade for your 356/912 flat-four engine, built around a matched pair of genuine Weber IDF carburetors. Legendary tunability, a huge jet and accessory catalog, and the crisp, hungry throttle that made the IDF the benchmark air-cooled carb.

Why genuine Weber IDF

• Genuine Weber 40mm IDF carburetors — the original, not a clone; the widest tuning-parts catalog in the hobby.
• Complete bolt-on kit — carburetor(s), intake manifold(s), air cleaner(s), linkage, fuel line, and hardware included.
• Serious, even breathing — wakes up mid-range and top-end for a built street or performance motor.
• Endlessly tunable — jets, emulsion tubes, and venturis are readily available to dial in your exact build.

Fitment

Confirmed fit (complete bolt-on kit) for:

• 912 — 1965-1976
• 356 — 1948-1955

Confirm your engine configuration before ordering. Genuine Weber carburetors re-jet easily to match your cam and displacement.

Specifications

• Part number: 44-1291-0
• Carburetor: Genuine Weber 40mm IDF, matched pair
• Configuration: Dual carburetor
• Shipping weight: 14.5 lb · Boxed: 19 x 13 x 10 in
• UPC: 707924235944

Common questions

• Is this a genuine Weber? Yes — a genuine Weber carburetor, not an imitation.
• Is it a complete kit? Yes — carburetor(s), manifold(s), air cleaner(s), linkage, and hardware are included. You supply fuel delivery (a 3–4 psi regulated low-pressure pump is recommended) and jetting for your build.
• What's the part number? 44-1291-0 (UPC 707924235944).
• Are you an authorized dealer? Yes — Washburn's Metal is an authorized EMPI/Weber dealer.

⚠ WARNING (California Proposition 65): This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov. Parts are legal for use on pre-pollution-controlled vehicles only.