GM 1851795 Nos Auto Trans Octane Adj Unit 2BBL

( Brand: Gm ), ( Manufacturer Part Number: 1851795 ), ( Part Type: Tran Unit ), ( Vintage Part: Yes )

Review GM Nos Chevrolet All Model's Auto Trans Octane Adj Unit fits 350 1969–1970

Octane Adjuster Unit for 1969-1970 Chevrolet 350 2bbl Automatic Transmission (GM Part #1851795, NOS)

This is an authentic, new old stock (NOS) Octane Adjuster Unit specifically designed for Chevrolet 350 2bbl automatic transmission engines manufactured between 1969 and 1970. The GM part number for this item is 1851795.

The Octane Adjuster Unit is an essential component of your engine's fuel system, as it helps regulate the fuel-air mixture by adjusting the engine's ignition timing based on the octane rating of the fuel being used. This ensures optimal engine performance, fuel efficiency, and longevity.

The unit is constructed of high-quality materials, ensuring durability and reliability. It comes in its original packaging, and it has never been installed or used before. The NOS status of this part ensures that it is free from any wear, corrosion, or damage that could come from years of use.

Installation of the Octane Adjuster Unit is relatively straightforward and can be done by most DIY enthusiasts or professional mechanics. The unit is designed to fit seamlessly into your existing fuel system, making for a hassle-free installation process.

By installing this authentic Octane Adjuster Unit, you can restore your 1969-1970 Chevrolet 350 2bbl automatic transmission engine to its original performance specifications. Whether you're restoring a classic car or simply looking to improve your daily driver, this is an investment that will pay off in both performance and peace of mind.

In summary, this is a high-quality, new old stock Octane Adjuster Unit for the 1969-1970 Chevrolet 350 2bbl automatic transmission engine. It is an essential component of your fuel system, and its NOS status ensures that it is free from any wear, corrosion, or damage. Installation is straightforward, and this unit will restore your engine to its original performance specifications.

Pros and Cons of Buying a GM 1851795 2bbl Auto Trans Octane Adj Unit for a 1969-1970 Chevrolet 350

The GM 1851795 Octane Adjuster Unit is a component of the automatic transmission system in certain 1969-1970 Chevrolet 350 engines. It is designed to optimize fuel efficiency and engine performance by adjusting the fuel octane level based on the engine's requirements. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this unit.

1. Improved Fuel Efficiency: By optimizing the fuel octane level, the Octane Adjuster Unit can help improve the overall fuel efficiency of the engine, leading to potential savings on fuel costs over time.

2. Enhanced Engine Performance: Proper fuel octane level can ensure better combustion and engine performance. This can translate to improved acceleration, smoother idling, and overall better driving experience.

3. Compatibility: The GM 1851795 unit is specifically designed for 1969-1970 Chevrolet 350 engines, ensuring a reliable and accurate fit.

1. Cost: Replacing or installing a new Octane Adjuster Unit can come with a considerable cost, which may not be feasible for all budgets.

2. Availability: These units may be difficult to find in the aftermarket due to their age, making it harder to source a replacement if needed.

3. Installation Complexity: Installing this unit may require professional expertise, which could add to the overall cost of the project.

The GM 1851795 Octane Adjuster Unit can offer several benefits, such as improved fuel efficiency and enhanced engine performance, for those who own a 1969-1970 Chevrolet 350. However, potential drawbacks, such as cost, availability, and installation complexity, should be carefully considered before making a purchase.

If you are experiencing issues with your vehicle's fuel efficiency or engine performance and suspect that the Octane Adjuster Unit might be the issue, it could be worth investing in a new one. However, it is recommended to consult with a professional mechanic to assess the situation and determine if this is indeed the root cause. Additionally, thoroughly researching the market and comparing prices from reputable suppliers can help ensure you are getting a fair deal.

Details:

PLEASE L K at the pictures before buying. What you see in the pictures is exactly what are buying on and nothing else. The GM parts book shows that the octane adjustment unit is correct for all 1969-1970 Chevrolet Passenger Car,Chevalier,El Amino,Monte Carlo,Nova,Chevy II and Camry model's with a 350 2BBL motor an automatic transmission.

You are buying on a new old stock 1969-1970 Chevrolet all model's 350 2BBL motor with an automatic transmission octane adjustment unit GM part number 1851795 in the original paper wrapper. Successful bidder to prepay high bid and free shipping within the lower 48 states.

part #: 1851795 prices

• $24.99-$76.75

specifications disripa:

• for models: 350
• for makes: Chevrolet
• for years: 1969-1970
• brand: Gm
• mpn: 1851795
• part type: Tran Unit
• vintage part: Yes

shipping disripa:

• type: Fixed
• cost: $0.00
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• transit: 3-8 Days

payments disripa:

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

offer disripa:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: March 18, 2026

seller disripa:

• city: Pelham, New Hampshire
• rating: 100.0%
• # reviews: 8680

returns disripa:

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

general disripa:

• condition: New
• Car Truck Parts Accessories > Ignition Systems Components > Distributors

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