DASHMAN SPREADBORE.5 Holley Spread Carb Phenolic Insulator Spacer Heat Soak Riser 1/2

( Brand: Dashman ), ( Manufacturer Part Number: SPREADBORE.5 ), ( Non-domestic Product: No ), ( Material: Phenolic ), ( Vintage Part: Yes ), ( Type: Carburetor ), ( Country Of Origin: United States )

Review DASHMAN For Holley Spread Bore Carb Phenolic Insulator Spacer Heat Soak Riser 1/2 Inch Open

The Dashman Spreadbore.5 for Holley Spread Carb Phenolic Insulator Spacer Heat Soak Riser is a crucial accessory for any racing or high-performance application using a Holley Spread Carburetor. This phenolic insulator spacer is designed to address the issue of heat soak, a common problem in racing conditions where the carburetor's fuel mixture can become too rich due to excessive heat.

This 1/2-inch Dashman Spreadbore.5 spacer is made from high-quality phenolic material, which is known for its excellent insulating properties. It is specifically engineered to be used with Holley Spread Carburetors, providing an effective solution to the heat soak issue that can affect the performance of your engine.

The spacer features a unique spreadbore design, which allows for better fuel distribution and atomization, resulting in improved engine performance and throttle response. This design also helps to eliminate fuel flow problems caused by excessive heat, ensuring that your carburetor delivers a consistent fuel mixture to your engine under all conditions.

The Dashman Spreadbore.5 for Holley Spread Carb Phenolic Insulator Spacer Heat Soak Riser is easy to install and requires no special tools or modifications to your carburetor or intake manifold. Simply replace the stock spacer with this upgraded phenolic insulator spacer, and you'll immediately notice the difference in your engine's performance.

In summary, the Dashman Spreadbore.5 for Holley Spread Carb Phenolic Insulator Spacer Heat Soak Riser is a must-have accessory for any racing or high-performance application using a Holley Spread Carburetor. Its unique spreadbore design, combined with its excellent insulating properties, provides a solution to the heat soak issue, resulting in improved engine performance, better fuel distribution, and more consistent throttle response.

Pros and Cons of Buying a Dashman Spreadbore.5 for Holley Spread Carb: A Comprehensive Analysis

The Dashman Spreadbore.5 for Holley Spread Carb is a popular aftermarket part that is designed to improve the performance of Holley spread carburetors. This part is specifically designed to address the issue of heat soak, which can affect the carburetor's ability to deliver consistent fuel mixtures under varying temperatures. In this analysis, we will discuss the pros and cons of purchasing this part.

1. Improved Performance: The primary advantage of using a Dashman Spreadbore.5 is the potential for increased performance. By reducing the size of the carburetor's venturi throat, the part allows for more airflow and better fuel mixture distribution. This can lead to improved engine response and power.

2. Reduced Heat Soak: Heat soak is a common problem in high-performance applications, where the carburetor can heat up and cause inconsistent fuel mixtures. The Dashman Spreadbore.5 is designed to address this issue by increasing the rate of airflow through the carburetor, which helps to keep it cooler.

3. Easy Installation: The Dashman Spreadbore.5 is a relatively simple part to install. It replaces the stock venturi throat and can typically be installed in under an hour with basic hand tools.

1. Cost: The Dashman Spreadbore.5 is not a cheap part, and it can be a significant investment for some enthusiasts. The cost of the part may be a deterrent for those on a tight budget.

2. Requires Tuning: The installation of the Dashman Spreadbore.5 may require some tuning to ensure optimal performance. This can involve adjusting the carburetor's jetting and other settings to ensure that the fuel mixture is consistent.

3. May Not Be Necessary for All Applications: The Dashman Spreadbore.5 may not be necessary for all applications. It is primarily designed for high-performance applications where heat soak is a significant issue. For less demanding applications, the stock carburetor may be sufficient.

The Dashman Spreadbore.5 for Holley Spread Carb is a high-performance aftermarket part that can offer significant benefits for enthusiasts who are looking to improve the performance of their carbureted engines. The part's ability to reduce heat soak and improve airflow can lead to improved engine response and power. However, it comes with some drawbacks, including a significant cost and the requirement for tuning. Ultimately, the decision to purchase a Dashman Spreadbore.5 should be based on an assessment of the specific needs and goals of the enthusiast's application.

If you are an enthusiast who is looking to maximize the performance of your high-performance carbureted engine and are experiencing issues with heat soak, then the Dashman Spreadbore.5 may be a worthwhile investment. However, it is essential to carefully consider the cost and the requirement for tuning before making a purchase. For those on a tighter budget or with less demanding applications, the stock carburetor may be sufficient.

Details:

Add a little performance to your machine the cheap way, and keep heat away from carburetor solve soak or boiling issues. This is a 1/2 thick phenolic open riser for the Holley spread bore 4 barrel carb. Price is for 1 riser and kit. Includes free gaskets, nuts, and washers.

Free sticker included.

part #: spreadbore5 price

• $45.00

specifications airfueldepo:

• brand: Dashman
• mpn: Spreadbore.5
• non-domestic product: No
• material: Phenolic
• vintage part: Yes
• type: Carburetor
• country of origin: United States

payments airfueldepo:

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

returns airfueldepo:

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

seller airfueldepo:

• city: Viroqua, Wisconsin
• # reviews: 16834
• rating: 99.5%

shipping airfueldepo:

• cost: $9.80
• type: Calculated
• class: Standard, Expedited
• transit: 4-9 Days
• carrier: USPS
• service: USPS First Class, USPS Priority Mail Small Flat Rate Box, USPS Priority Mail Express

general airfueldepo:

• Car Truck Parts Accessories > Air Fuel Delivery > Other Air Fuel Delivery
• condition: New

offer airfueldepo:

• started: February 8, 2026
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0

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