7 Best SBC 350 Aluminum Heads (Researched and Compared)

Upgrading the cylinder heads on a SBC 350 is one of the most effective ways to increase horsepower and torque. Aluminum heads offer weight savings and better heat dissipation compared to iron. We researched and compared seven top aluminum head options based on manufacturer specifications, industry standards, and aggregated owner feedback. This guide breaks down each head’s strengths, limitations, and ideal applications to help you choose the right set for your build.

1. AFR 195cc Enforcer SBC Aluminum Cylinder Heads: Top Pick

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In our evaluation, the AFR 195cc Enforcer heads consistently deliver some of the best airflow and power gains for street/strip SBC 350 builds. The 195cc intake runner is optimized for engines with mild to moderate cams and intakes, providing a broad torque curve. Owner feedback confirms impressive horsepower gains, often exceeding 30-40 hp over stock iron heads. The CNC porting ensures uniformity, and the bronze guides and hardened seats contribute to durability.

However, these heads come at a higher cost, which may not suit tight budgets. They are also not the best choice for high-RPM race-only applications where larger runners would be better. If you are building a performance street engine and can invest in quality, the AFR Enforcer is a top contender. Skip them if you need a budget-friendly option or plan to run forced induction with large boost levels.

• Straight spark plug location for header clearance
• CNC-profiled intake and exhaust ports for consistent flow
• Bronze valve guides and hardened exhaust seats for longevity

Pros: Excellent out-of-the-box flow numbers; Strong mid-range and top-end power
Cons: Premium price point limits budget builds

2. Edelbrock E-Street 60879 SBC Aluminum Cylinder Heads: Best Value

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Based on owner feedback and the spec sheets, the Edelbrock E-Street heads are a solid choice for budget-conscious builders who want a reliable upgrade without breaking the bank. The 170cc intake runner is a good match for stock to mild 350s, providing a noticeable improvement in throttle response and low-end torque. The included valve springs handle moderate lift cams, making installation straightforward.

However, these heads are not intended for aggressive racing applications. The smaller runner size and as-cast ports restrict top-end power, and the valve springs may need upgrading for cams over 0.480″ lift. If you are building a daily driver or a mild street machine, the E-Street heads offer great value. Skip them if you plan to build a high-horsepower engine or need maximum flow.

• Designed for stock replacement and mild performance upgrades
• As-cast intake ports with CNC-machined chamber
• Includes valve springs for up to 0.480" lift

Pros: Affordable entry into aluminum heads; Works well with stock or mild camshafts
Cons: Limited airflow potential for high-performance builds

3. Dart Pro 1 180cc SBC Aluminum Cylinder Heads: Best for Street/Strip

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In our comparison, the Dart Pro 1 180cc heads offer a versatile option for street/strip SBC 350s. The 180cc runner size is a sweet spot for many performance builds, providing strong mid-range power while still allowing good top-end breath. The CNC-profiled intake ports enhance flow over as-cast designs, and the ductile iron seats and bronze guides promote longevity. Owner feedback generally praises the power gains and reliability.

However, we found occasional reports of casting imperfections such as flash or uneven surfaces that require minor cleanup. This can add time to installation. Additionally, the price is moderate but not the cheapest. If you want a proven performer for a mild to moderate build and don’t mind some potential prep work, these are a good choice. Skip them if you want a completely ready-to-bolt-on set with no fuss.

• CNC-profiled intake ports for improved flow
• Ductile iron valve seats and phosphor bronze guides
• Straight spark plug location for header clearance

Pros: Good balance of flow and velocity; Durable valve train components
Cons: Some owners report inconsistent casting quality

4. Summit Racing SUM-162151 SBC Aluminum Cylinder Heads: Budget Friendly

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Based on owner feedback and the spec sheets, the Summit Racing heads are one of the most economical ways to upgrade from iron heads. The 190cc intake runner is larger than stock, offering potential for improved airflow, but the as-cast finish means inconsistency. Many users report that a mild porting job significantly improves performance. The heads come with essential hardware like rocker studs and guide plates, which is convenient.

However, the valve springs are only rated for cams up to about 0.500″ lift, limiting their use with more aggressive profiles. Durability is acceptable for street use, but some owners have noted porosity in castings. If you are on a tight budget and willing to do some cleanup work, these heads can work. Skip them if you want a high-performance build or need guaranteed quality out of the box.

• As-cast intake ports with CNC machined chambers
• Includes 7/16 rocker studs and pushrod guide plates
• Compatible with standard intake and exhaust manifolds

Pros: Very affordable price point; Good for budget builds needing more flow than stock
Cons: As-cast ports may require porting for best results; Valve springs are only adequate for mild cams

5. ProMaxx Performance 200cc SBC Aluminum Cylinder Heads: Best for High Horsepower

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In our evaluation, the ProMaxx 200cc heads are designed for serious performance applications. The large 200cc intake runner and 2.08-inch intake valves allow substantial airflow, making them suitable for high-horsepower builds with aggressive cams and high compression. The CNC porting is well-executed, and the included heavy-duty springs handle lifts over 0.600″ without issues. Owner feedback from racers is positive for top-end power.

However, the large runner size can hurt low-end torque on street-driven 350s with mild cams, making the engine feel sluggish off idle. Additionally, some owners have reported that the valve seats may wear prematurely if not properly maintained. These heads are best for dedicated race cars or high-performance street machines with supporting modifications. Skip them if you want a street-friendly torque curve or are not building a high-horsepower engine.

• CNC-ported intake and exhaust for maximum flow
• Heavy-duty valve springs for high-lift cams
• Includes 7/16 rocker studs and screw-in studs

Pros: Excellent flow for high-RPM power; Capable of supporting 500+ hp
Cons: Large runner may kill low-end torque on mild builds; Some owners report valve seat durability issues

6. BluePrint Engines BP1801 SBC Aluminum Cylinder Heads: Best for Bolt-On Ease

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Based on owner feedback and the spec sheets, the BluePrint Engines BP1801 heads are marketed as a hassle-free upgrade. They come fully assembled with quality components like bronze guides and hardened seats, and they fit stock intake and exhaust manifolds without issues. For a simple replacement on a daily driver or mild build, they offer convenience.

However, in our comparison, the flow numbers are lower than many similarly priced heads, and some owners have reported casting defects or mismatched chamber volumes. The performance gains are modest, and the valve springs are only suitable for cams up to 0.480″ lift. If you want a straightforward bolt-on with minimal fuss, these can work. Skip them if you are chasing maximum power or want consistent high-quality castings.

• Fully assembled with valves, springs, retainers, and keepers
• Includes bronze valve guides and hardened exhaust seats
• Compatible with stock accessories and manifolds

Pros: Ready to bolt on out of the box; Good compatibility with stock parts
Cons: Modest flow performance compared to competitors; Some owners report inconsistent quality control

7. Speedmaster PCE261.1001 SBC Aluminum Cylinder Heads: Entry Level

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In our evaluation, the Speedmaster heads are the most affordable aluminum heads available, making them accessible for budget builds. The 185cc runner size is a moderate upgrade from stock, and the heads include necessary hardware. Some owners have reported noticeable power gains when paired with a mild cam and intake.

However, the as-cast ports often have rough surfaces that hinder flow, and the valve springs are notoriously weak, often requiring immediate replacement. Quality control issues such as porosity and warped decks are also reported. These heads are best for builders on a very tight budget who are willing to invest time in porting and spring upgrades. Skip them if you want a reliable out-of-the-box solution or are not experienced with head preparation.

• As-cast intake and exhaust ports
• Includes 7/16 rocker studs and guide plates
• Straight spark plug location

Pros: Lowest price among aluminum head options; Decent for basic performance improvement
Cons: Inconsistent casting quality and finish; Valve springs are weak and should be replaced

Frequently Asked Questions

What size aluminum heads are best for a SBC 350?

The ideal runner size depends on your engine’s intended use. For street-driven 350s with mild cams, 170-180cc intake runners offer good torque and throttle response. For high-performance street/strip builds, 185-195cc runners provide a balance of mid-range and top-end power. For all-out race applications, 200cc or larger runners maximize high-RPM horsepower but sacrifice low-end torque.

Do aluminum heads require special gaskets or bolts?

Yes, aluminum heads typically require specific head gaskets designed for aluminum surfaces to prevent galvanic corrosion. Many builders use MLS (multi-layer steel) gaskets with a rubber coating. Also, use head bolts or studs that are compatible with aluminum threads; some manufacturers recommend using thread sealant on bolts that go into water jackets.

Can I use stock valve covers and intake manifold with aftermarket aluminum heads?

Most aftermarket aluminum heads are designed to accept stock valve covers and intake manifolds, but check the head’s specifications. Some heads have raised intake ports or angled spark plugs that may require aftermarket intake or header modifications. Always verify compatibility before purchasing.

What valve spring pressure do I need for a SBC 350 with a performance cam?

Valve spring pressure should match your camshaft’s lift and duration. For mild cams (up to 0.480″ lift), springs with 110-120 lbs seated pressure and 280-300 lbs open pressure are common. For aggressive cams (0.500″+ lift), you may need 130-140 lbs seated and 330-350 lbs open. Always follow the cam manufacturer’s recommendations.

How much horsepower can I expect from upgrading to aluminum heads on a SBC 350?

Horsepower gains vary based on the head design and your engine’s current state. On a stock 350, a quality set of aluminum heads can add 30-50 hp. On a well-built engine with a matching cam and intake, gains of 50-80 hp are possible. However, the heads must be matched to the rest of the combination for optimal results.

Our Verdict

After researching and comparing the top SBC 350 aluminum heads, the AFR 195cc Enforcer stands out as the top pick for overall performance and quality, delivering excellent flow and power gains for street/strip builds. For budget-conscious builders, the Edelbrock E-Street 60879 offers the best value without sacrificing reliability. Choose based on your power goals and budget.