Upgrading the cylinder heads on a 350 small block Chevy is one of the most effective ways to increase horsepower and torque. We researched and compared the leading aftermarket heads, evaluating manufacturer specifications, published flow data, and aggregated owner feedback to bring you this guide. Our goal is to help you match the right head to your build, whether you’re after street manners, strip performance, or towing reliability.
| Photo | Product | Score | Buy |
|---|---|---|---|
|
🚗
|
AFR 195cc Eliminator Top Pick 195cc intake runner, 65cc combustion chamber, 2.02/1.60 valves |
9.2 | 🛒 Check Price |
|
🚗
|
Dart SHP 180cc Best Value 180cc intake runner, 64cc chamber, 2.02/1.60 valves, cast iron |
8.7 | 🛒 Check Price |
|
🚗
|
Edelbrock E-Street 60899 Best for Daily Drivers 170cc intake runner, 64cc chamber, 1.94/1.50 valves, aluminum |
8.4 | 🛒 Check Price |
|
🚗
|
ProMaxx 200cc Aluminum Best for High RPM 200cc intake runner, 64cc chamber, 2.02/1.60 valves, aluminum |
8.1 | 🛒 Check Price |
|
🚗
|
GM Performance Parts 19300958 Factory Replacement Upgrade 64cc chamber, 1.94/1.50 valves, cast iron, Vortec style |
7.8 | 🛒 Check Price |
|
🚗
|
Speedmaster 200cc Aluminum Budget Performance 200cc intake runner, 64cc chamber, 2.02/1.60 valves, aluminum |
7.3 | 🛒 Check Price |
|
🚗
|
RHS Pro Action 180cc Solid Mid-Range 180cc intake runner, 64cc chamber, 2.02/1.60 valves, aluminum |
8.3 | 🛒 Check Price |
1. AFR 195cc Eliminator: Top Pick
In our evaluation, the AFR 195cc Eliminator stands out as the best all-around head for a 350 SBC. We compared flow bench data from the manufacturer and independent tests, and these heads consistently outperform others in the 195cc class. The CNC-profiled ports provide excellent velocity and volume, making them ideal for 350ci engines targeting 400-500 horsepower. Owner feedback highlights easy installation and noticeable gains on the dyno.
However, these heads are not for the budget-conscious builder. The premium price reflects the precision machining and high-quality materials. If you are building a low-compression, stock-cam 350, you will not see the full benefit, and a more affordable head may be a better fit. But for a performance street or weekend warrior, the AFR 195cc Eliminators are a top choice.
- CNC-profiled intake and exhaust ports deliver exceptional airflow out of the box
- A356 aluminum casting with bronze valve guides for long service life
- Includes high-quality valve springs suitable for hydraulic roller cams up to 0.600" lift
Pros: Outstanding flow numbers for street/strip builds; Excellent build quality and consistent port volumes
Cons: Higher price point than many budget alternatives
2. Dart SHP 180cc: Best Value
For builders on a tighter budget, the Dart SHP 180cc heads offer a compelling mix of performance and durability. We researched owner reports and found that these heads are a popular choice for daily drivers and mild street machines. The 180cc intake runner is well-suited for a 350 with a stock or mild cam, providing good throttle response and torque from idle to 5500 rpm. The cast iron construction is robust and less prone to thermal distortion than some budget aluminum heads.
That said, the weight penalty is real; these heads add about 20 pounds per side compared to aluminum. They also have limited flow potential for high-rpm builds. If your goal is a 6000+ rpm screamer, look elsewhere. But for a reliable, torquey street engine that sees regular use, the Dart SHP 180cc heads are a smart choice.
- Straight spark plug location for better header clearance
- Heat-treated cast iron construction resists cracking
- Designed for mild to moderate street performance with good low-end torque
Pros: Excellent value for the price; Durable cast iron holds up well under high heat
Cons: Heavier than aluminum heads, adding weight to the front end
3. Edelbrock E-Street 60899: Best for Daily Drivers
The Edelbrock E-Street 60899 heads are designed with the daily driver in mind. We compared the runner volume and flow data, and these 170cc heads are optimized for low-rpm torque and fuel efficiency. Owner feedback often mentions easy installation and no need for immediate aftermarket rockers. The aluminum construction sheds weight and helps with heat dissipation.
However, the small 1.94/1.50 valves and mild porting mean these heads choke above 5000 rpm. If you plan to rev higher or add a large cam, these are not the right choice. But for a stock-replacement or mild upgrade on a truck or cruiser, they deliver dependable performance and a noticeable seat-of-the-pants improvement.
- As-cast intake ports with minimal finish work required
- Includes stainless steel valves and valve stem seals
- Designed for 1986 and earlier blocks with standard intake bolt pattern
Pros: Lightweight aluminum reduces front-end weight; Good low-end torque for daily driving
Cons: Smaller valves limit top-end power potential
4. ProMaxx 200cc Aluminum: Best for High RPM
The ProMaxx 200cc heads target the enthusiast building a high-winding 350. In our research, these heads flow well on the bench, especially at higher lifts, making them suitable for camshafts with 0.550″ lift or more. The large runners support big power above 5000 rpm. The price is attractive for a fully assembled aluminum head.
However, we found mixed owner feedback regarding quality control. Some users reported casting flash in the ports or minor oil leaks from the head gasket surface. These heads require careful inspection before installation. They are not ideal for a street car that sees stop-and-go traffic, as the large runners can hurt low-end torque. But for a track-focused build, they offer serious potential at a competitive price.
- Large runner volume supports high-rpm power up to 6500+ rpm
- CNC-blended valve bowls for improved flow
- Comes assembled with 7/4 valve springs for aggressive cams
Pros: Excellent high-rpm flow for racing applications; Good value for the performance level
Cons: Quality control issues reported by some users, including casting flaws
5. GM Performance Parts 19300958: Factory Replacement Upgrade
If you need a direct replacement for a factory Vortec 350, the GM Performance 19300958 heads are a solid choice. We compared these to the original castings and found they maintain the same port geometry while incorporating hardened seats for unleaded fuel. Owner feedback praises the hassle-free installation and improved drivability over worn-out originals.
However, these heads offer only modest performance improvements. The small valves and restrictive ports limit power to around 300-350 hp. They are not suitable for high-performance builds. If you are simply refreshing a stock engine or doing a mild rebuild, these are a reliable, no-surprises option. But for more power, aftermarket heads are necessary.
- Direct bolt-on for 1987-1995 350 TBI and Vortec engines
- Improved swirl design for better fuel atomization
- Includes valve stem seals and hardened exhaust seats
Pros: Factory quality and fitment; Works with stock intake and exhaust manifolds
Cons: Limited performance gains compared to aftermarket heads
6. Speedmaster 200cc Aluminum: Budget Performance
The Speedmaster 200cc heads are the cheapest aluminum heads we evaluated. They offer impressive flow numbers on paper, and some owners report good results on mild street/strip engines. The price makes them accessible to budget builders.
However, we found significant quality concerns. Several owners reported porosity, misaligned valve guides, and even cracks after minimal use. The thin casting walls make them risky for forced induction or aggressive nitrous use. If you are building a low-stress, naturally aspirated engine and are willing to inspect and possibly touch up the heads, they can work. But we recommend spending a bit more for a more reliable option.
- Affordable fully assembled aluminum head
- Large runners for high-rpm power
- Includes valve springs for moderate cams up to 0.550" lift
Pros: Very low price for an aluminum head; Decent flow for the money
Cons: Inconsistent quality; some heads need rework; Thin castings may crack under high boost or nitrous
7. RHS Pro Action 180cc: Solid Mid-Range
The RHS Pro Action 180cc heads occupy a solid middle ground. We compared them to the Dart SHP and found similar flow characteristics, but with aluminum construction for less weight. Owner feedback generally praises the fit and finish, noting they are ready to install out of the box. They work well with mild to moderate cams and support up to about 450 hp.
One limitation is that they are not as extensively documented as some competitors, and aftermarket support (like custom pushrod lengths) may require more research. They are not the best for all-out racing, but for a dependable street/strip 350, they are a worthy contender. If you want a lightweight alternative to cast iron without breaking the bank, these are a strong option.
- As-cast runner design with CNC bowl blend
- Straight spark plug location for header clearance
- Ductile iron valve seats for durability with unleaded fuel
Pros: Good balance of flow and velocity for street/strip; Quality construction with few reported issues
Cons: Not as well-known as AFR or Dart, resale value may be lower
Frequently Asked Questions
What size cylinder head is best for a 350 SBC?
The ideal runner volume depends on your intended use. For a street-driven 350 with a mild cam, 170-180cc intake runners provide good low-end torque and throttle response. For a performance street/strip build targeting 400+ hp, 195cc heads are a popular choice. For high-rpm racing, 200cc or larger may be used, but they can hurt low-end torque on a 350.
Should I choose aluminum or cast iron heads for a 350 SBC?
Aluminum heads are lighter, dissipate heat better, and allow higher compression ratios without detonation due to better heat transfer. Cast iron heads are heavier but more durable under extreme heat and boost, and they are often less expensive. For most street and strip applications, aluminum is preferred for weight savings and performance potential.
Can I use stock intake and exhaust manifolds with aftermarket heads?
It depends on the head design. Many aftermarket heads, especially Vortec-style, require a specific intake manifold with a raised port pattern. Exhaust manifolds may also need adapters if the head uses a different bolt pattern or spark plug location. Always check compatibility before purchasing.
Do I need to upgrade my camshaft when changing cylinder heads?
To fully utilize better-flowing heads, a matching camshaft is typically recommended. However, you can install heads on a stock cam and see some gains, especially in torque. For maximum benefit, choose a cam with appropriate lift and duration to match the head’s flow characteristics and your RPM goals.
What valve springs should I use with aftermarket heads?
Most aftermarket heads come assembled with valve springs suitable for a specific cam lift range. If you are using a cam with more lift than the springs are rated for, you will need to upgrade to heavier springs. Always verify the spring pressure and installed height for your cam profile to avoid valve float or coil bind.
Our Verdict
After extensive research and comparison, the AFR 195cc Eliminator takes the top spot for its outstanding flow, build quality, and performance potential for street/strip 350 builds. For budget-conscious builders, the Dart SHP 180cc offers the best value in a durable cast iron package. Choose based on your horsepower goals and budget, and always verify compatibility with your existing components.
Last reviewed and spec-checked: June 1, 2026. We re-check our picks and listings periodically.
