fits model: Gto, 455, 400, Firebird, Grand. make: Pontiac.

( Manufacturer Part Number: 6X-4 ), ( Part Type: Cylinder Tran Head )
The GTO 93cc 455 Firebird 400 6x-4 Cylinder Pontiac Trans Head Assemblies are high-performance components designed for enthusiasts looking to upgrade their classic Pontiac engines. These assemblies are specifically engineered for the 400 cubic inch 6-cylinder engine found in the GTO and Firebird models.
The GTO 93cc Trans Head Assemblies are made from top-quality materials, ensuring durability and reliability. They feature a 93cc combustion chamber, which increases the volume of the combustion space, allowing for more fuel and air to be mixed, resulting in a more powerful and efficient combustion process. This can lead to improved engine performance, increased horsepower, and better fuel efficiency.
The 6x-4 cylinder design of these assemblies provides a balance of power and efficiency. The 6-cylinder configuration offers a smooth and responsive power delivery, while the 4-cylinder head design allows for better flow of air and fuel into the combustion chambers, improving engine breathing and efficiency.
These assemblies are also designed to fit seamlessly into your existing engine, making for a hassle-free installation process. They are precision-machined to ensure a perfect fit, reducing the risk of leaks or other issues.
In addition, the GTO 93cc Trans Head Assemblies are designed with performance in mind. They feature advanced valve technology, including roller rocker arms and high-lift camshafts, which allow for faster valve opening and closing, improving engine performance and response.
Overall, the GTO 93cc Trans Head Assemblies are a great choice for anyone looking to upgrade their classic Pontiac engine. They provide improved performance, increased horsepower, and better fuel efficiency, all while offering a smooth and reliable operation.
Pros of buying a GTO 93cc 455 Firebird with 6x-4 cylinder Pontiac Trans heads:1. Power: The 93cc 455 engine is a powerful engine, providing a substantial amount of horsepower and torque.
2. Unique: The 6x-4 cylinder configuration is a rare find, making the vehicle a unique and eye-catching addition to any collection.
3. Durability: Pontiac engines are known for their durability and reliability, which can translate to a long-lasting and dependable vehicle.
4. Value: The rarity and power of the vehicle can make it a valuable investment, with potential for high resale value.
Cons of buying a GTO 93cc 455 Firebird with 6x-4 cylinder Pontiac Trans heads:1. Rarity: The rarity of the vehicle can make it difficult to find replacement parts, which can be expensive and time-consuming.
2. Modifications: The 6x-4 cylinder configuration may not be easy to modify or upgrade, limiting the vehicle's ability to be customized to the owner's preferences.
3. Maintenance: The powerful engine may require more frequent and costly maintenance, such as oil changes and tune-ups.
4. Fuel Efficiency: The powerful engine may not be as fuel-efficient as other vehicles, leading to higher fuel costs.
Conclusion:The GTO 93cc 455 Firebird with 6x-4 cylinder Pontiac Trans heads is a unique and powerful vehicle that can be a valuable investment. However, the rarity of the vehicle can make it difficult to find replacement parts and modify, and the powerful engine may require more frequent and costly maintenance. Ultimately, the decision to purchase this vehicle should be based on the owner's budget, preferences, and willingness to invest in a rare and powerful vehicle.
Recommendation:If you are looking for a unique and powerful vehicle, the GTO 93cc 455 Firebird with 6x-4 cylinder Pontiac Trans heads may be a good fit for you. However, it is important to do your research and budget accordingly, as the vehicle may require more frequent and costly maintenance. Additionally, be prepared for the potential difficulty in finding replacement parts and modifying the vehicle to your preferences.
They need a good cleaning and valve job, 2 valves are cracked otherwise all the other cylinders had a compression reading of 120 125psi. The heads were removed from a Pontiac 350 engine that I want to increase compression on and use until 455 is built.
These are decent cylinder heads to bump up compression on a 455 and maybe even a 400 if need be.