Carburetor Rebuild Kit, for 40 DNCF Weber

RECLAIM PERFORMANCE WITH THE EMPI WEBER 40 DCNF REBUILD KIT

Restore the crisp throttle response and legendary performance of your Weber 40 DCNF carburetors with this comprehensive EMPI rebuild kit. The 40 DCNF is a favorite among air-cooled VW enthusiasts who want a compact, high-flowing down-draft setup that fits perfectly under the decklid of a Beetle or Ghia without the clearance issues often found with larger IDF or IDA units. Over time, heat cycles and modern ethanol-blended fuels take a toll on internal gaskets and diaphragms, leading to sluggish acceleration, difficult idling, and dangerous fuel leaks. This kit provides everything needed to refresh your fuel system, ensuring that your air-fuel mixture remains precise across the entire RPM range for maximum horsepower and smooth cruising. If you have noticed "popping" through the intake or a flat spot during acceleration, it is likely that your internal seals have succumbed to age, and this kit is the professional-grade solution to those common ailments.

Precision is the name of the game when it comes to Weber carburetors, and this EMPI kit is engineered to meet or exceed original equipment specifications for a perfect fit every time. By replacing the worn needle and seat, you eliminate the risk of fuel flooding or starvation, while a fresh accelerator pump diaphragm ensures that "instant-on" throttle response that makes twin-barrel carbs so exciting to drive. Whether you are running a single DCNF on a center-mount manifold or a dual-carburetor setup on a high-displacement stroker engine, this tune-up kit is the professional''s choice for routine maintenance. Don''t let a brittle gasket or a clogged O-ring stand between you and a perfectly tuned engine; invest in quality components that are specifically designed to withstand the chemical rigors of the modern road and keep your classic VW running at its peak potential.

VEHICLE FITMENT & COMPATIBILITY

This rebuild kit is designed for the Weber 40 DCNF series carburetor. While the 40 DCNF was original equipment on many European exotics, it is most commonly found in the air-cooled world on performance-modified engines including:

• Volkswagen Type 1 Beetle / Bug: All years equipped with DCNF intake manifolds.
• Volkswagen Type 2 Bus / Transporter: 1600cc through 2000cc engines running DCNF setups.
• Volkswagen Type 3 Fastback, Squareback, Notchback: Ideal for dual DCNF clearance.
• Volkswagen Karmann Ghia: Fits under the low-profile decklid with appropriate manifolds.
• Volkswagen Thing (Type 181): Perfect for off-road performance reliability.
• Custom Applications: Sand Rails, Dune Buggies, and Manx-style bodies utilizing Weber 40 DCNF or HPMX/EPC clones.

TECHNICAL SPECIFICATIONS & KIT CONTENTS

Every component in this EMPI kit is manufactured to tight tolerances to ensure a leak-free seal and reliable fuel metering. The kit includes:

• Manufacturer: EMPI
• Part Number: 00-9948-0
• Compatible Model: Weber 40 DCNF (and high-quality aftermarket clones).
• Needle & Seat: Precision-machined assembly with a Viton tip for superior sealing against modern fuels.
• Accelerator Pump Diaphragm: High-grade elastomer designed for high-frequency cycling without tearing.
• Top Plate Gasket: Heavy-duty fiber gasket material that resists shrinking and fuel saturation.
• O-Ring Assortment: Includes all necessary seals for jet stacks, mixture screws, and throttle shafts.
• Sealing Washers: Aluminum and fiber crush washers for fuel inlet bolts and pump jets.
• Fuel Compatibility: Optimized for use with standard pump gas and E10 ethanol blends.

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