FORD C6AZ-91589-AR Carburetor Spacer 390GT

( Type: Spacer ), ( Manufacturer Part Number: C6AZ-91589-AR ), ( Vintage Part: No ), ( Country Of Origin: United States )

Review FORD Carburetor Spacer And fits MUSTANG COUGAR FAIRLANE COMET 1966–1967

Introducing the Ford C6AX-91589-AR carburetor spacer, specifically designed for Ford Muscle cars from the years 1966 and 1967. This component is an essential upgrade for any Ford Mustang, Cougar, Fairlane, or Comet vehicle equipped with a 390 GT engine and a Holley 2300 or 4150 series carburetor.

The Ford C6AX-91589-AR carburector spacer is meticulously crafted from high-quality materials, ensuring superior durability and reliability. It is engineered to address the common issue of excessive fuel trim in these classic Ford models when upgrading to a modern carburetor. By providing an additional space between the carburetor and intake manifold, this spacer helps to restore optimal engine performance and fuel efficiency.

This spacer features a precise, CNC-machined design, ensuring a perfect fit for your Ford's intake manifold. Its smooth, polished finish not only enhances the overall aesthetic appeal of your engine bay but also minimizes the potential for fuel leaks. Additionally, the spacer is designed to maintain proper clearance for the engine's valves and other critical components.

Installation of the Ford C6AX-91589-AR carburetor spacer is a straightforward process. It is designed to be a direct replacement for the stock spacer, making it an ideal choice for DIY enthusiasts and professional mechanics alike. Simply remove the old spacer, install the new one, and enjoy the improved performance of your Ford Muscle car.

In conclusion, the Ford C6AX-91589-AR carburetor spacer is an essential upgrade for any Ford Mustang, Cougar, Fairlane, or Comet from the 1966 and 1967 model years with a 390 GT engine and a Holley 2300 or 4150 series carburetor. It addresses the issue of excessive fuel trim, restores optimal engine performance, and offers a simple, straightforward installation process. Upgrade your classic Ford today with this high-quality carburetor spacer.

Pros and Cons of Buying a Ford C6AR-91589-A Carburetor Spacer for 1966-1967 Mustang, Cougar, Fairlane, and Comet

The Ford C6AR-91589-A carburetor spacer is a popular aftermarket part designed to address carburetor-related issues in certain Ford vehicles from the 1960s, including Mustang, Cougar, Fairlane, and Comet models. This article aims to provide an unbiased analysis of the pros and cons of purchasing this part to help potential buyers make an informed decision.

1. Improved Air/Fuel Mixture: The primary function of a carburetor spacer is to provide better air flow to the carburetor, which can lead to a more efficient air/fuel mixture. This can result in improved engine performance, increased power, and better fuel economy.

2. Solves Carburetor-Related Issues: Many 1960s Ford owners report issues with their stock carburetors, such as poor idling, rough running, and uneven power delivery. A carburetor spacer can help address these issues, making the driving experience smoother and more enjoyable.

3. Easy Installation: The Ford C6AR-91589-A carburetor spacer is designed to be a direct replacement for the stock spacer, making the installation process relatively simple. It typically takes only a few hours for an average DIYer to install this part.

4. Cost-Effective: Compared to other performance upgrades, a carburetor spacer is a relatively affordable investment. It can provide noticeable performance improvements without the need for a major engine rebuild or expensive modifications.

1. Potential Power Loss: Some users have reported a slight loss in power after installing a carburetor spacer. This is due to the increased air flow, which can cause the engine to run leaner than stock. However, this can be mitigated by adjusting the carburetor mixture or using a performance chip.

2. Limited Performance Gain: While a carburetor spacer can provide noticeable performance improvements, it is not a substitute for more extensive engine modifications. For those seeking significant power gains, a more comprehensive engine build or supercharger may be necessary.

3. Potential for Increased Emissions: The increased air flow provided by a carburetor spacer can lead to an increase in hydrocarbon emissions. This may be a concern for those living in areas with strict emissions regulations.

The Ford C6AR-91589-A carburetor spacer can be a valuable investment for 1966-1967 Mustang, Cougar, Fairlane, and Comet owners looking to improve their vehicle's performance. It offers a cost-effective solution to common carburetor-related issues and can provide noticeable power gains. However, it is essential to consider the potential downsides, such as the possibility of power loss and increased emissions, before making a purchase. Ultimately, the decision to buy a carburetor spacer depends on an individual's specific goals, budget, and driving preferences.

For those seeking to improve the performance of their 1966-1967 Ford vehicle, a carburetor spacer can be a worthwhile investment. However, it is essential to research the specific model and year of the vehicle to ensure compatibility and consider the potential pros and cons before making a purchase. Additionally, it is recommended to consult with a professional mechanic or performance specialist to determine if a carburetor spacer is the best solution for your specific situation.

part # c6az91589 prices

• $225.00-$299.95

specifications carbcaddie:

• for models: Mustang, Cougar, Fairlane, Comet
• for makes: Ford
• for years: 1966-1967
• type: Spacer
• manufacturer part number: C6AZ-91589-AR
• vintage part: No
• country of origin: United States

offer carbcaddie:

• best offers: True
• options: Ship-to-home
• quantity: 1
• sold: 0
• started: January 4, 2026
• availability: In Stock

seller carbcaddie:

• rating: 100.0%
• # reviews: 2681

shipping carbcaddie:

• service: USPS Priority Mail Medium Flat Rate Box
• cost: $18.20
• transit: 4-8 Days
• carrier: USPS
• class: Expedited
• type: Calculated

payments carbcaddie:

• other
• wallet: Google-pay
• credit card: Diners-club

returns carbcaddie:

• policy: No Returns

general carbcaddie:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts
• condition: Used

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