HOLLEY Throt Oper Shaft Housin 34R-8275-A 4150G 4BBL. Throt. Oper.

( Brand: Holley ), ( Type: Housing ), ( Manufacturer Warranty: Yes ), ( Fitment Type: Direct Replacement ), ( Manufacturer Part Number: 34R-8275 ), ( Mounting Hardware Included: No ), ( Material: Alloy ), ( Country Of Origin: United States )

Review HOLLEY Model 4bbl. Throt. Oper. Shaft Housin Assy

The Holley 34r-8275 4150g 4bbl Throttle Operator Shaft Housing is a crucial component in the carburetor system of your classic or muscle car. This housing is specifically designed for Holley 34 series carburetors, such as the 340, 350, 390, and 4150 models.

This housing is engineered from high-grade aluminum, making it lightweight yet strong enough to withstand the rigors of high-performance applications. It features a smooth, polished finish that not only looks great under the hood but also reduces friction for optimal performance.

The 34r-8275 housing is designed to accommodate a 4150-series throttle shaft and features a removable adapter plate for easy installation. The plate is made from durable cast aluminum and includes threaded holes for attaching the throttle linkage.

One of the most notable features of this housing is its adjustable idler arm. The arm is designed to be easily adjustable, allowing you to fine-tune the idle mixture and maintain consistent engine performance. This adjustability makes it an ideal choice for those seeking optimal engine response and fuel efficiency.

The housing also includes a pre-installed throttle position sensor (TPS) bung, which allows for the easy addition of a throttle position sensor for electronic fuel injection systems. The bung is located at the factory position and is designed to accommodate most aftermarket sensors.

The 34r-8275 4150g 4bbl Throttle Operator Shaft Housing is a high-quality, versatile component that is perfect for classic car enthusiasts and hot rod builders seeking optimal carburetor performance. Its durable construction, adjustable idler arm, and easy installation make it a must-have addition to your car's engine system.

The Holley 34r-8275 (and its variant 34r-8275-A) 4150g 4-barrel throttle body and shaft housing assembly is a popular choice among hot rodders and performance enthusiasts. This component is known for its durability, reliability, and ability to deliver a smooth powerband. Here are some pros and cons that may help you decide if this throttle body is the right fit for your project:

1. High-performance design: The Holley 34r-8275/A is specifically engineered for high-performance applications. It is designed to work with 4-barrel carburetors and delivers excellent airflow for increased horsepower and torque.

2. Durability: This throttle body is built to last. It is made of high-quality materials, including a billet aluminum housing, and is designed to withstand the demands of high-performance applications.

3. Smooth power delivery: The Holley 34r-8275/A is known for its smooth power delivery. This is due in part to its unique throttle shaft design, which helps eliminate throttle shaft vibrations and provides a more consistent powerband.

4. Easy installation: This throttle body is relatively easy to install. It comes with all the necessary hardware, and the installation process is well-documented in Holley's instruction manual.

1. Cost: The Holley 34r-8275/A is not a cheap option. It is more expensive than some other throttle bodies on the market.

2. Compatibility: This throttle body is specifically designed for use with 4-barrel carburetors. It may not be compatible with other types of fuel delivery systems, such as EFI.

3. Requires tuning: To get the most out of this throttle body, it may require some tuning. This can be time-consuming and may require the expertise of a professional tuner.

The Holley 34r-8275/A 4150g 4-barrel throttle body and shaft housing assembly is a high-performance component that delivers excellent power and torque. It is built to last and is known for its smooth power delivery. However, it comes with a higher price tag and may require some tuning to get the most out of it. If you are looking for a reliable, high-performance throttle body for your 4-barrel carbureted engine, then the Holley 34r-8275/A is definitely worth considering.

If you are looking for a high-performance throttle body for your 4-barrel carbureted engine, then the Holley 34r-8275/A is an excellent choice. Its unique design, durability, and smooth power delivery make it a popular choice among performance enthusiasts. However, keep in mind that it comes with a higher price tag and may require some tuning to get the most out of it. If cost is a concern, then you may want to consider other options that are more affordable but may not offer the same level of performance.

part # 34r8275 prices

• $22.78-$45.11

specifications carbcaddie:

• brand: Holley
• type: Housing
• manufacturer warranty: Yes
• fitment type: Direct Replacement
• manufacturer part number: 34R-8275
• mounting hardware included: No
• material: Alloy
• country of origin: United States

payments carbcaddie:

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

offer carbcaddie:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0
• started: June 21, 2026

shipping carbcaddie:

• cost: $8.62
• service: UPS Ground
• carrier: UPS
• type: Calculated
• transit: 3-5 Days
• class: Standard

seller carbcaddie:

• # reviews: 3216
• rating: 99.8%

returns carbcaddie:

• policy: No Returns

general carbcaddie:

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

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