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  3. GM 9778737

GM 9778737 Nos Set Exhaust Valves General 389 8.6 C/r

fits model: Bonneville, Catalina. make: Pontiac. year: 1965–1966.

9778737 General Motors Nos Set 8 Gm 1965-1966 Pontiac Bonneville Catalina 389 8.6 C/r Exhaust Valves

( Brand: Gm ), ( Manufacturer Part Number: 9778737 ), ( Country Of Origin: United States ), ( Type: Exhaust Valve ), ( Material: Steel ), ( Vintage Part: Yes )

Review GM General Motors Nos Set Pontiac 389 8.6 C/r Exhaust Valves fits BONNEVILLE CATALINA 1965–1966

Introducing the 9778737 NOS (New Old Stock) Exhaust Valves specifically designed for 1965-1966 Pontiac Bonneville and Catalina models equipped with the 389 cubic inch 8.6:1 compression ratio engine. These authentic NOS parts are a must-have for enthusiasts restoring or customizing their classic Pontiacs, as they preserve the originality and integrity of the vehicle.

The exhaust valves are meticulously crafted from premium materials, ensuring durability and reliable performance. Each valve is designed to function seamlessly with the engine's exhaust system, allowing for optimal engine efficiency and power output. The valves are engineered to withstand the extreme heat and pressure generated within the engine, providing long-lasting performance.

These 9778737 NOS exhaust valves are a direct fit for the specified Pontiac models, ensuring a hassle-free installation process. They come in their original packaging, preserving the authenticity and adding to the collectible value of these classic vehicles. Installing these NOS exhaust valves is a great way to enhance the performance and maintain the historical accuracy of your 1965-1966 Pontiac Bonneville or Catalina.

By using NOS exhaust valves, you're not only improving the performance and reliability of your classic Pontiac, but you're also preserving its originality and value. These parts are not only functional upgrades but also contribute to the overall authenticity and appeal of your restored or customized classic Pontiac.

In summary, the 9778737 NOS exhaust valves for 1965-1966 Pontiac Bonneville and Catalina models offer a perfect blend of performance and originality. These premium parts are designed to provide reliable exhaust flow and improve engine efficiency, all while maintaining the historical accuracy and value of your classic Pontiac.

Buying 1965-1966 Pontiac Bonneville/Catalina 389 8.6 c/r exhaust valves can provide several benefits and drawbacks for car enthusiasts and restorers. Here are some potential pros and cons:

Pros:

1. Performance Enhancement: Installing aftermarket exhaust valves can improve the performance of your Pontiac Bonneville or Catalina by allowing for better exhaust flow and reducing backpressure. This can lead to increased horsepower and torque, as well as improved engine responsiveness.

2. Originality: If you are restoring a classic Pontiac Bonneville or Catalina, using original GM 1965-1966 exhaust valves can help maintain the authenticity of the vehicle. This can be important for preserving the value of the car and ensuring that it remains true to its original design.

3. Durability: Aftermarket exhaust valves may not be as durable as original GM parts, and using genuine GM exhaust valves can help ensure that your car's exhaust system lasts as long as possible.

4. Easy Installation: Exhaust valves are a relatively simple part to install, and many enthusiasts may be able to do the job themselves with basic tools and some mechanical knowledge.

Cons:

1. Cost: Original GM exhaust valves can be quite expensive, especially compared to aftermarket alternatives. This may be a significant investment for some car owners, especially if they are working on a tight budget.

2. Availability: Finding original GM exhaust valves for a 1965-1966 Pontiac Bonneville or Catalina may be a challenge, as these parts are no longer in production. This can make it difficult and time-consuming to source the parts you need.

3. Oversizing: If you are using aftermarket exhaust valves, there is a risk that they may be oversized for your car's exhaust system. This can lead to a number of issues, including poor performance, decreased fuel efficiency, and even engine damage.

4. Compatibility: It is important to ensure that the exhaust valves you purchase are compatible with your specific model of Pontiac Bonneville or Catalina. Failing to do so could result in installation issues and decreased performance.

Conclusion:

Deciding whether or not to buy original GM 1965-1966 Pontiac Bonneville/Catalina 389 8.6 c/r exhaust valves ultimately comes down to your priorities as a car enthusiast or restorer. If authenticity and durability are your top concerns, then using original GM parts may be the best choice. However, if cost is a significant factor, or if you are looking for aftermarket performance upgrades, then alternative exhaust valves may be a more viable option. Regardless of which route you choose, it is important to ensure that the parts you purchase are compatible with your car and are installed correctly to avoid any potential issues.

Recommendation:

If you are looking for genuine GM exhaust valves for your 1965-1966 Pontiac Bonneville or Catalina, I would recommend checking with reputable classic car parts suppliers or contacting Pontiac dealerships to see if they have any available. If cost is a concern, you may want to explore aftermarket alternatives and do your research to ensure that they are compatible with your car and provide the desired performance benefits. Ultimately, the decision is yours, but I hope this information helps you make an informed choice.

Details:

NOS Set 8 GM 1965-1966 Pontiac Bonneville Catalina 389 8.6 C/R Exhaust Valves. CORVETTE NCRS BLOOMINGTON GOLD L88 LT1 CORVAIR CORSA CHEVY II NOVA Z16 C10 C20 C30 PICKUP TRUCK SERIES 10 20 30 PACE CAR INDY. Original New Old Stock. 455 FORMULA TEMPEST T37 GT37 GTO BONNEVILLE 2 CATALINA GP GRAND PRIX GMC TRUCK SPRINT EL CAMINO FLEETLINE FLEETSIDE CADILLAC DEVILLE SEVILLE ELDORADO BERITZ OLDSMOBILE OLDS F85 CUTLASS 442 W30 W31 RAM ROD HURST H/O SURVIVOR RAT STREET LOWRIDER RESTO-MOD PONTIAC FIREBIRD TA TRANS AM SD SUPER DUTY IV.O.

part #: 9778737 prices

  • $15.00-$109.50

specifications voomvalve:

  • for models: Bonneville, Catalina
  • for makes: Pontiac
  • for years: 1965-1966
  • brand: Gm
  • mpn: 9778737
  • country of origin: United States
  • type: Exhaust Valve
  • material: Steel
  • vintage part: Yes

seller voomvalve:

  • city: Decatur, Georgia
  • # reviews: 3500
  • rating: 100.0%

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offer voomvalve:

  • started: May 17, 2026
  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • best offers: True
  • availability: In Stock

general voomvalve:

  • Engines Engine Parts > Valvetrain Components > Valves
  • condition: New other see details

shipping voomvalve:

  • cost: $11.95
  • type: Fixed
  • class: Standard
  • transit: 4-10 Days
  • carrier: USPS
  • service: USPS Ground Advantage

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  • paid by: Seller
  • time: 30 Days
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for models: bonneville, catalina, for makes: pontiac, for years: 1965-1966, country of origin: united states, type: exhaust valve, vintage part: yes,
category: auto parts > engines engine parts > valvetrain components > valves, material: steel, sku: 13853566708399772,

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3 offers $15.00–$109.50 USD
  • Offer #1: $109.50 price + $11.95 shipping estimate = $121.45* total. CORVETTE NCRS BLOOMINGTON GOLD L88 LT1 CORVAIR CORSA CHEVY II NOVA Z16 C10 C20 C30 PICKUP TRUCK SERIES 10 SERIES 20 SERIES 30 PACE CAR INDY. PONTIAC FIREBIRD TA TRANS AM SD SUPER DUTY RAM IV H.O.+$11.95 shipping
  • Offer #2: $15.00 price + $10.95 shipping estimate = $25.95* total. Price may not be competitive so please feel free to make an offer. NOS GM Valve, Exhaust 389 8.6 Comp 65 - 66 Bonneville, Executive, Catalina, 2 + 2, Early Grand Prix Picture of item is available on request.+$10.95 shipping
  • Offer #3: $29.99 price + $19.45 shipping estimate = $49.44* total. 8.6 Compression Ratio. GM Part #.+$19.45 shipping

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