Imagine your Small Block Chevy engine roaring to life, a symphony of power and speed. What’s the secret ingredient that unlocks that thrilling performance? More often than not, it’s the cylinder heads. But dive into the world of Small Block Chevy heads, and you’ll quickly find yourself swimming in a sea of options. It can feel overwhelming, like trying to pick the perfect toy from a giant toy store, each one promising more fun than the last.
Choosing the right heads can make a huge difference in how your engine runs. Get it wrong, and you might end up with less power, a rougher ride, or even headaches trying to make everything fit and work together. But don’t worry! By the time you finish reading this post, you’ll understand the key things to look for. We’ll break down what makes one head better than another for your specific needs, helping you move past the confusion and towards a decision you’ll be proud of.
So, let’s get ready to unlock the true potential of your Small Block Chevy. We’ll explore the fascinating world of these crucial engine components and equip you with the knowledge to make a smart choice.
Our Top 5 Small Block Chevy Heads Recommendations at a Glance
Top 5 Small Block Chevy Heads Detailed Reviews
1. Flotek Cylinder Head
Rating: 8.8/10
Upgrade your Small Block Chevy engine with the Flotek Cylinder Head (102-505). This assembled aluminum head is designed for performance, featuring large 2.020-inch intake valves and 1.600-inch exhaust valves. Its 180cc intake runners and 64cc combustion chambers help boost power. The included 1.460-inch springs are ready for action. This head is made in the USA, ensuring quality craftsmanship for your vehicle. It’s a direct fit for your Small Block Chevy, making the installation process smoother.
What We Like:
- The large valve sizes (2.020/1.600 in) help your engine breathe better, leading to more power.
- The 180cc intake runners are a good size for many performance builds, improving airflow.
- It’s made from lightweight aluminum, which can help with overall vehicle weight.
- The combustion chambers are a good size at 64cc, helping to achieve a strong compression ratio.
- It comes assembled with 1.460-inch springs, saving you time and effort.
- It’s proudly made in the United States.
What Could Be Improved:
- The package dimensions are quite large (24.1″ x 10.7″ x 8.6″), so shipping might be a bit bulky.
- While a great upgrade, the price point might be a consideration for some DIY mechanics.
This Flotek cylinder head is a solid choice for anyone looking to enhance their Small Block Chevy’s performance. It offers a great combination of features for a noticeable power increase.
2. SBC 350 Cylinder Head Bare Straight Plug Aluminum Perfect fits for Chevy Small Block 302
Rating: 9.2/10
Looking to boost the power and performance of your classic Chevy small block engine? The SBC 350 Cylinder Head Bare Straight Plug Aluminum is a fantastic upgrade for your 302, 327, 350, 383, or 400 engine. These heads are built with high-grade aluminum for a lighter feel and feature bronze valve guides for long-lasting reliability. The advanced port design helps your engine breathe better, leading to more horsepower. They’re designed to fit perfectly in popular muscle cars like the Camaro Z28, Chevelle, and Monte Carlo, making them ideal for hot rods and street rods.
What We Like:
- Made from strong, high-grade aluminum.
- Bronze valve guides and hardened seats mean they last a long time.
- The port design helps the engine get more air for better performance.
- They fit many Chevy small block engines, like the 350.
- The 64cc combustion chambers help with power and keep the original compression for older engines.
- The thick deck design makes them tough enough for nitrous, turbo, or superchargers.
- They will fit many cool cars like the Camaro Z28 and Chevelle.
What Could Be Improved:
- These heads are sold bare, meaning you’ll need to buy valves, springs, and other parts separately.
- The 200cc intake runner size is a good all-around choice, but serious racers might want larger runners for extreme performance.
These SBC 350 cylinder heads offer a significant performance advantage for your Chevy small block. They are a solid choice for anyone wanting to enhance their classic car’s power and sound.
3. Speedmaster PCE435.1005 Compatible with Chevy SBC 350 Straight Plug Solid FT Cylinder Head Top End Engine Combo Kit
Rating: 9.0/10
The Speedmaster PCE435.1005 is a top-end engine combo kit for Chevy SBC 350 engines. It features 435 cylinder heads. Speedmaster is known for making cool parts by mixing old and new ideas. Their team works hard to invent new things and do things in a smart way.
What We Like:
- The kit is “Track Proven,” meaning it’s built to handle tough driving on roads, races, and for fun.
- Speedmaster focuses on making products that are almost perfect.
- It comes with a 12-month limited worldwide warranty, so you have peace of mind.
- The cylinder heads are designed for straight plug solid FT applications, which is important for performance.
What Could Be Improved:
- The product description doesn’t give specific details about the power gains or performance improvements you can expect.
- More information about the exact materials used in the kit would be helpful for buyers.
- It might be difficult to find detailed installation guides or support for this specific combo kit.
This Speedmaster engine combo kit offers a solid upgrade for your Chevy SBC 350. It’s built for performance and backed by a warranty, making it a trustworthy choice for enthusiasts.
4. Auto Dynasty Aluminum Bare Cylinder Head Compatible with Chevy Small Block 302/327/350/383/400 SBC 200cc Intake 68cc Chamber
Rating: 9.2/10
Looking to boost the power of your classic Chevy small block engine? The Auto Dynasty Aluminum Bare Cylinder Head, designed for SBC engines like the 302, 327, 350, 383, and 400 up to 1986, offers a fantastic upgrade. This pack of two bare cylinder heads is built for performance, giving your engine a new lease on life.
What We Like:
- These heads are lighter than traditional iron heads, making installation easier and improving overall vehicle performance.
- The 200cc intake runners and optimized 68cc combustion chambers are engineered to increase horsepower and efficiency.
- They feature a 3-angle valve seat and a straight spark plug angle for better combustion and performance.
- The square intake and exhaust ports allow for excellent airflow.
- This product is designed to retain stock compression for 1970 and earlier models, making it a great option for restoration projects.
What Could Be Improved:
- These heads are not compatible with Vortec style intake manifolds, which might require additional parts or modifications for some engine setups.
- They are bare heads, meaning you’ll need to purchase valves, springs, and other components separately to complete the assembly.
If you’re building a performance Chevy small block, these Auto Dynasty cylinder heads are a solid choice. They provide a great foundation for a powerful and efficient engine.
5. Flotek 101505 Aluminum Cylinder Head for Small Block Chevy
Rating: 9.4/10
Upgrade your Small Block Chevy engine with the Flotek 101505 Aluminum Cylinder Head. This assembled cylinder head is designed to boost your engine’s performance. It features large valves and a well-proportioned intake runner to help your engine breathe better. The combustion chamber size is optimized for a good balance of power and efficiency. Made from aluminum, it’s lighter than cast iron heads, which can help your car perform better.
What We Like:
- The aluminum construction makes it lightweight.
- The 2.020 inch intake valves and 1.600 inch exhaust valves allow for more air and fuel to enter the engine.
- The 180cc intake runners help improve airflow.
- The 64cc combustion chambers offer a good compression ratio for street performance.
- It comes assembled, saving you time and effort.
What Could Be Improved:
- For some advanced builds, a larger intake runner volume might be desired.
- Availability can sometimes be limited, so plan your purchase ahead of time.
This Flotek cylinder head is a solid choice for many Small Block Chevy enthusiasts looking for improved performance. It offers a great combination of features for a noticeable power upgrade.
Small Block Chevy Heads: Your Guide to More Power
So, you’re looking to give your Small Block Chevrolet engine a serious upgrade? New cylinder heads are one of the best ways to do it! They’re like the lungs of your engine, helping it breathe in more air and fuel for more power. This guide will help you pick the right ones.
Key Features to Look For
When you’re shopping for Small Block Chevy heads, keep an eye out for these important features:
- Valve Size: Bigger valves let more air and fuel into the engine. This usually means more power. Look for heads with larger intake and exhaust valve diameters.
- Combustion Chamber Size: This affects your engine’s compression ratio. A smaller chamber generally increases compression, which can give you more power but might require higher octane fuel.
- Port Design: These are the passages where air and fuel travel. Well-designed ports help the engine breathe better. Look for smooth, well-shaped ports.
- Bolt Pattern: Make sure the heads will fit your specific engine block. Most Small Block Chevys use a standard bolt pattern, but it’s always good to double-check.
- Accessory Mounts: Where will you bolt on things like your intake manifold and exhaust headers? Check that the heads have the right holes in the right places.
Important Materials
The material your heads are made from makes a big difference:
- Aluminum: These heads are lighter than iron ones. This can help your car handle better. Aluminum also helps engines run cooler. They are usually more expensive.
- Cast Iron: These are the classic choice. They are strong and durable. Iron heads are typically less expensive than aluminum. They are also heavier.
Factors That Improve or Reduce Quality
What makes some heads better than others?
- Brand Reputation: Well-known brands often use better designs and materials. They have a track record of making good parts.
- Manufacturing Process: Precision in how the heads are made is crucial. CNC (Computer Numerical Control) machining ensures accuracy and consistency. This leads to better performance.
- Porting and Polishing: Some heads come with ports already improved for better airflow. This is a big plus. If they aren’t, you might need to do this yourself or pay someone to do it.
- Valve Seats and Guides: The quality of these small but important parts affects how well the valves work and how long the heads last.
User Experience and Use Cases
Who uses these heads and why?
- Street Performance: If you want your car to be faster and sound better for everyday driving, performance heads are a great upgrade. They can improve acceleration and overall power.
- Racing: For drag racing or track days, specialized heads are essential. They are designed for maximum airflow and power at high engine speeds.
- Restoration Projects: Sometimes, you might want to replace original heads with something that looks similar but offers better performance.
10 FAQs About Small Block Chevy Heads
Q: What is the most common type of Small Block Chevy head?
A: The most common types are cast iron and aluminum heads.
Q: Do I need special tools to install new heads?
A: Yes, you will need a torque wrench, gasket scrapers, and potentially other engine-specific tools.
Q: How much horsepower can new heads add?
A: Depending on the heads and other engine modifications, you could see anywhere from 20 to over 100 horsepower.
Q: Are aluminum heads always better than iron heads?
A: Not necessarily. Aluminum heads are lighter and cool better, but iron heads are often more affordable and durable.
Q: What is a “runner” in a cylinder head?
A: A runner is the passageway that air and fuel travel through to enter the cylinder.
Q: Should I buy heads that are already ported and polished?
A: If your budget allows, yes. It saves you the time and effort of doing it yourself.
Q: Will new heads work with my existing intake manifold?
A: Usually, but you should always check the bolt patterns and port matching.
Q: What is the difference between “stock replacement” and “performance” heads?
A: Stock replacement heads are designed to be like your original heads. Performance heads have larger ports and valves for more power.
Q: How do I know what size valves I need?
A: Larger valves are generally better for performance, but they need to fit within the cylinder bore. The engine’s intended use also matters.
Q: Can I install new heads myself?
A: If you have good mechanical skills and the right tools, yes. However, it’s a job that requires precision and attention to detail.
In conclusion, every product has unique features and benefits. We hope this review helps you decide if it meets your needs. An informed choice ensures the best experience.
If you have any questions or feedback, please share them in the comments. Your input helps everyone. Thank you for reading.