HOLLEY 41R-390 Idel Cam Carb 41R-403 6145 6149

( Brand: Holley ), ( Country Of Origin: United States ), ( Fitment Type: Direct Replacement ), ( Manufacturer Part Number: 41R-390 ), ( Mounting Hardware Included: No ), ( Type: Holley Fast Idle Cam ), ( Ipn: 41r-403 ), ( Manufacturer Warranty: No Warranty ), ( Surface Finish: Plastic )

Review HOLLEY Fast Idel Cam Carb Model fits 1940–1949

The Holley 41r-390 IDA (Intake Dominator Technology Adaptive) carburetor, model number 41r403, is a high-performance, fuel-efficient solution for your vintage hot rod or race vehicle from the years 1940, 1945, 1946, and 1949 with engine codes 6145 and 6149. This carburetor is designed specifically for applications requiring a 390 cubic inch engine, offering an ideal balance between power and economy.

This Holley carburetor features advanced Intake Dominator Technology (IDA), which ensures optimal air/fuel ratio distribution throughout the engine RPM range. IDA technology provides improved idle quality, quicker throttle response, and smoother power delivery, all while maintaining superior fuel efficiency.

The 41r-390 IDA carburetor boasts a robust, billet aluminum construction, ensuring durability and longevity even under the most demanding racing conditions. It comes equipped with a high-performance, vacuum-secondary accelerator pump, providing ample fuel delivery for large-bore intake manifolds and high-rpm operation.

Additionally, this carburetor includes a Holley Syncro Jet secondary metering system, which offers fine-tuned secondary metering jets that are easily adjustable for optimal engine performance. The Syncro Jet system also features a built-in air bleed system, ensuring quick and easy setup for a perfect vacuum secondary system.

The Holley 41r-390 IDA carburetor is also compatible with various Holley fuel systems, including electric and mechanical pumps, allowing for easy integration and customization to meet the specific requirements of your vintage hot rod or race vehicle.

In summary, the Holley 41r-390 IDA carburetor is a high-performance, fuel-efficient, and durable solution for your vintage hot rod or race vehicle with a 390 cubic inch engine. Its advanced Intake Dominator Technology, robust construction, and versatile compatibility make it an exceptional choice for enthusiasts seeking optimal engine performance and fuel efficiency.

The Holley 4140 4160 series carburetors are known for their high performance and versatility. The specific model you mentioned, the Holley 4140 IDA 4140-390 carburetor, is a part of this series and is designed for use in applications where a high-performance carburetor is required. Here are some pros and cons of buying this carburetor:

1. High Performance: The Holley 4140 IDA series carburetors are designed for high performance applications. The IDA (Induction Discharge Adapter) design allows for better fuel atomization, which results in more complete combustion and improved power output.

2. Versatility: The Holley 4140 series carburetors are available in a wide range of sizes and configurations, making them suitable for use in a variety of applications.

3. Fuel Efficiency: The Holley carburetors are known for their fuel efficiency, which can help save money on fuel costs in the long run.

4. Easy to Install: Holley carburetors are known for their ease of installation, making them a popular choice among DIY enthusiasts.

5. High-Quality Construction: Holley carburetors are built to last. They are made from high-quality materials and are designed to withstand the rigors of high-performance applications.

1. Cost: Holley carburetors are more expensive than some other options on the market.

2. Complexity: Holley carburetors can be more complex to tune than some other options, requiring more time and expertise to get them running optimally.

3. Maintenance: Holley carburetors require more maintenance than some other types of fuel systems, such as fuel injection.

4. Fuel Consumption: While the Holley carburetors are known for their fuel efficiency, they can consume more fuel than some other options, especially in high-performance applications.

In conclusion, the Holley 4140 IDA 4140-390 carburetor is a high-performance option that offers versatility, fuel efficiency, and ease of installation. However, it comes with a higher cost, complexity, and maintenance requirements compared to some other options. If you are looking for a high-performance carburetor for your application and are willing to invest the time and money into tuning it, then the Holley 4140 IDA 4140-390 carburetor is a great choice. Alternatively, if you are looking for a more cost-effective or low-maintenance option, you may want to consider other options, such as a fuel injection system.

part # 41r390 prices

• $21.76-$30.00

specifications carbcaddie:

• for years: 1940-1949
• brand: Holley
• country of origin: United States
• fitment type: Direct Replacement
• manufacturer part number: 41R-390
• mounting hardware included: No
• type: Holley Fast Idle Cam
• interchange part number: 41R-403
• manufacturer warranty: No Warranty
• surface finish: Plastic

returns carbcaddie:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

general carbcaddie:

• condition: New other see details
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts

shipping carbcaddie:

• cost: $6.00
• type: Fixed
• carrier: USPS
• transit: 5-11 Days
• class: Standard
• service: USPS Ground Advantage

offer carbcaddie:

• started: January 4, 2026
• options: Ship-to-home
• sold: 0
• quantity: 3
• availability: In Stock

payments carbcaddie:

• credit card: Discover
• wallet: Apple-pay
• other

seller carbcaddie:

• rating: 99.8%
• # reviews: 1118

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