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GM 346286 Big Block Cylinder Head Peanut Port

fits model: 454.

346286 Gm Big Block Cylinder Head 454 Peanut Port

( Brand: Gm ), ( Manufacturer Part Number: 346286 ), ( Type: Cylinder Head ), ( Material: Cast Iron ), ( Vintage Part: Yes ), ( Finish: Unfinished ), ( Country Of Origin: United States ), ( Item Weight: 80 Lb ), ( California Prop 65 Warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm. )

Review GM Big Block Cylinder Head Peanut Port fits 454

GM 346286 Big Block Cylinder Head - 454 Peanut Port

The GM 346686 Big Block Cylinder Head, commonly known as the 'Peanut Port' head, is a high-performance upgrade for your 454 cubic inch engine. This cylinder head is a testament to General Motors' engineering expertise, designed to deliver increased power, efficiency, and reliability.

The Peanut Port moniker originates from the unique shape of the intake ports, which are shallower and wider compared to traditional heads. This design allows for a more efficient airflow into the combustion chamber, resulting in improved combustion and horsepower. The port configuration also allows for a wider variety of intake manifold options, providing flexibility for engine builders.

This Big Block Cylinder Head features a cast iron construction, ensuring durability and heat resistance. The head is equipped with 2-bolt per cylinder mating surface for the pistons, providing enhanced strength and reduced flex for optimal engine performance. The head also features a 2.02/1.60 intake/exhaust valve size, respectively, which can accommodate a wide range of valve springs and camshafts, allowing for extensive tuning options.

The GM 346286 Big Block Cylinder Head - 454 Peanut Port is a top choice for performance enthusiasts and professional mechanics who seek to enhance the power and efficiency of their 454 big block engines. Its unique design, durable construction, and versatile tuning options make it a standout component in the world of high-performance engine building. Whether you're building a muscle car, hot rod, or race car, this cylinder head is sure to deliver the power and reliability you need to take your engine to the next level.

The GM 346286 Big Block Cylinder Head 454 Peanut Port has its advantages and disadvantages, which are as follows: Pros:

1. High Performance: This cylinder head is known for its high-performance capabilities due to its peanut-shaped ports, which allow for increased airflow and better combustion.

2. Durability: GM products are generally known for their durability, and this cylinder head is no exception. It is built to withstand high engine temperatures and stress.

3. Compatibility: This cylinder head is compatible with various 454 engines, making it a versatile choice for many classic car owners.

Cons:

1. Cost: The GM 346286 Big Block Cylinder Head 454 Peanut Port is a premium product and can be quite expensive compared to other options in the market.

2. Availability: Due to its high demand, this cylinder head may not always be readily available, which could delay your project.

3. Installation: Installing this cylinder head requires a certain level of expertise, and improper installation could lead to engine damage.

In conclusion, the GM 346286 Big Block Cylinder Head 454 Peanut Port is a high-performance, durable, and versatile option for those looking to boost the power of their 454 engine. However, its high cost, potential availability issues, and installation complexity are factors to consider. If you have the necessary expertise, resources, and are prepared for the investment, this cylinder head could be an excellent choice. If not, it might be worth considering less expensive options or seeking professional assistance for installation.

Details:

Made of cast iron and weighing 80 lbs, this unfinished cylinder head is designed for high-performance engines. The Big Block Cylinder Head 454 Peanut Port is a vintage performance part manufactured by GM in the USA.

part #: 346286 price

  • $400.00

specifications cylinderheapar:

  • for models: 454
  • brand: Gm
  • mpn: 346286
  • type: Cylinder Head
  • material: Cast Iron
  • vintage part: Yes
  • finish: Unfinished
  • country of origin: United States
  • item weight: 80 Lb
  • california prop 65 warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm.

payments cylinderheapar:

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

returns cylinderheapar:

  • policy: No Returns

general cylinderheapar:

  • condition: Used
  • Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

offer cylinderheapar:

  • quantity: 1
  • started: October 21, 2025
  • availability: In Stock
  • best offers: True
  • options: Ship-to-home
  • sold: 0

seller cylinderheapar:

  • # reviews: 36
  • rating: 100.0%
  • city: Moore Haven, Florida

shipping cylinderheapar:

  • cost: $180.00
  • service: Flat Rate Freight
  • class: Freight
  • type: Fixed
for models: 454, type: cylinder head, vintage part: yes, finish: unfinished, country of origin: united states, item weight: 80 lb, california prop 65 warning: this product may contain chemicals known to the state of california to cause cancer, birth defects, or other reproductive harm.,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, material: cast iron, sku: 10690587627076781,
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1 offer $400.00 USD
  • Used. Offer #1 priced at $400.00 + $180.00 shipping estimate = $580.00* total. 1 set of 2 Made of cast iron this unfinished cylinder head is designed for high-performance engines.+$180.00 shipping

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