USA SPEED 122-70 Jets Thread Holley Carburetor 1/4-32 4150 4160

( Brand: Usa Speed ), ( Type: Carburetor Main Jets ), ( Ipn: 122-70 ), ( Manufacturer Warranty: Yes ), ( Fitment Type: Oem / Stock ), ( Mounting Hardware Included: No ), ( Country Of Origin: United States )

Review USA SPEED Pair Main Jets Size 1/4-32 Thread Brass 4150 4160 Holley Carburetor fits 1970

Introducing the Holley 122-70 Jet Hot Rod Carburetor, a high-performance fuel delivery system designed for hot rods and other high-performance applications. This carburetor is equipped with 70 jets, which are numbered 12 through 40, and features a 32 thread size. The main jet size is suitable for engines with a displacement between 4150 and 4160 cubic inches.

The Holley 122-70 Jet Hot Rod Carburetor is known for its exceptional power production and easy tuning capabilities. It comes with a 1-1/16 inch primary bore and a 2-inch secondary bore, allowing for efficient fuel delivery to meet the demands of high-performance engines.

This carburetor is constructed with precision machined components and durable materials to ensure long-lasting performance. It also includes a high-quality float bowl gasket and a baffled float bowl to help maintain consistent fuel level and prevent fuel starvation during high-RPM operation.

The 122-70 Jet Hot Rod Carburetor is also equipped with a vacuum secondary system, which provides additional fuel to the engine under vacuum conditions, such as when the throttle is closed at high RPMs. This feature helps improve engine performance and power output, especially during acceleration.

The carburetor is also compatible with Holley's electronic fuel injection systems, allowing for easy conversion to electronic fuel injection for improved fuel delivery and tuning capabilities. Additionally, it comes with a 6-71 intake manifold flange, making it a direct replacement for many popular hot rod intake manifolds.

Overall, the Holley 122-70 Jet Hot Rod Carburetor is a powerful and versatile fuel delivery system that is ideal for hot rods and other high-performance applications. Its precision machined components, durable materials, and easy tuning capabilities make it a top choice among performance enthusiasts.

The Holley 122-70 Jet Hot Rod Carburetor, with a 4150 or 4160 series base plate and 70 1/4-32 thread size, is a popular choice among hot rod and performance enthusiasts. Here are some pros and cons to consider before making a purchase:

1. High-Performance: Holley carbs are renowned for their ability to deliver excellent power and torque in race and high-performance applications.

2. Adjustability: These carbs offer a high degree of adjustability, allowing you to fine-tune your engine's performance for various driving conditions.

3. Durability: Holley carbs are built to last, with robust construction and materials that can withstand the rigors of high-performance driving.

4. Customization: Holley offers a wide range of options and accessories, allowing you to customize your carburetor to meet your specific needs and preferences.

5. Wide Applicability: These carbs are suitable for a wide range of applications, from small block Chevy engines to big-block Ford engines and beyond.

1. Complexity: Holley carbs can be more complex to install and tune than some other types of carbs.

2. Cost: These carbs can be more expensive than other types of carbs, especially when you consider the cost of additional components and accessories.

3. Maintenance: Holley carbs require regular maintenance to ensure optimal performance, including regular cleaning and adjustment.

4. Fuel Economy: Due to their high-performance design, these carbs may not be the best choice for vehicles prioritizing fuel economy.

The Holley 122-70 Jet Hot Rod Carburetor is an excellent choice for those seeking high-performance and customization options. Its durability and wide applicability make it a popular choice among hot rod and performance enthusiasts. However, its complexity, cost, and maintenance requirements are important considerations to keep in mind. Ultimately, if you're looking for a high-performance carburetor that can be customized to meet your specific needs, the Holley 122-70 Jet Hot Rod Carburetor is an excellent investment.

If you're considering purchasing a Holley 122-70 Jet Hot Rod Carburetor, we recommend doing thorough research on the specific model and any additional components or accessories you may need. Consulting with a professional mechanic or carburetor expert can also be helpful in ensuring a successful installation and tuning process. Additionally, be prepared for the ongoing maintenance requirements to keep your carburetor performing at its best.

specifications carbcaddie:

• for years: 1970
• brand: Usa Speed
• type: Carburetor Main Jets
• interchange part number: 122-70
• manufacturer warranty: Yes
• fitment type: Oem / Stock
• mounting hardware included: No
• country of origin: United States

seller carbcaddie:

• # reviews: 1114
• rating: 99.2%

offer carbcaddie:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: January 23, 2026
• best offers: True

returns carbcaddie:

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

payments carbcaddie:

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

general carbcaddie:

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

shipping carbcaddie:

• transit: 4-8 Days
• type: Fixed
• cost: $0.00
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS

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