The LQ4 engine is a workhorse. But its stock heads can limit its potential. Upgrading your heads unlocks serious horsepower and torque. It's one of the best mods for your LQ4.
Picking the right heads can be tricky. You need to consider your budget and goals. This guide will help you find the best heads for your LQ4 build.
Quick Summary: Top Picks
- Best Overall: AFR 230cc LS1 SBC Cylinder Heads
- Best Budget: Summit Racing SUM-152121 Cylinder Heads
- Best for Boost: Trick Flow Specialties TFS-30600001-M61 Cylinder Heads
- Best for Torque: Edelbrock 73925 Cylinder Heads
- Best for Street: ProMaxx Performance 217cc Cylinder Heads
Top 5 Best Heads for LQ4 Reviews
1. AFR 230cc LS1 SBC Cylinder Heads
The AFR 230cc LS1 heads are a top-tier choice for LQ4 engines. They are known for their exceptional airflow and performance gains. These heads offer significant improvements over stock, especially in higher RPM ranges.
Pros:
- ✅ Excellent airflow for maximum power.
- ✅ High-quality construction and durable design.
- ✅ Improved throttle response and top-end performance.
Cons:
- ❌ Higher price point compared to other options.
- ❌ May require additional modifications for optimal performance.
- ❌ Not ideal for low-RPM, torque-focused builds.
Verdict: These heads are perfect for serious enthusiasts. They want maximum horsepower gains from their LQ4. Expect a noticeable difference in performance.
2. Summit Racing SUM-152121 Cylinder Heads
Summit Racing SUM-152121 heads are a budget-friendly upgrade. They offer a good balance of performance and affordability. These are a solid choice for those looking to improve their LQ4 without breaking the bank.
Pros:
- ✅ Affordable price point.
- ✅ Decent performance gains over stock heads.
- ✅ Direct bolt-on installation.
Cons:
- ❌ Not as high-performing as premium options.
- ❌ May require additional porting for maximum airflow.
- ❌ Quality control can be inconsistent.
Verdict: These heads are great for budget-conscious builders. You still want a noticeable performance improvement. It’s a good bang for your buck.
3. Trick Flow Specialties TFS-30600001-M61 Cylinder Heads
Trick Flow Specialties TFS-30600001-M61 heads are designed for boosted applications. They can handle the increased cylinder pressure of turbo or supercharged engines. These heads offer excellent flow and durability under high-stress conditions.
Pros:
- ✅ Designed for boosted applications.
- ✅ Strong and durable construction.
- ✅ Excellent airflow for forced induction.
Cons:
- ❌ May not be ideal for naturally aspirated engines.
- ❌ Can be overkill for mild builds.
- ❌ Higher price compared to standard heads.
Verdict: If you're planning a turbo or supercharger build, these heads are a must-have. They provide the strength and flow needed for high-horsepower applications.
4. Edelbrock 73925 Cylinder Heads
Edelbrock 73925 heads are designed for optimal torque production. They provide excellent low-end and mid-range power. These heads are ideal for trucks and street cars needing more grunt off the line.
Pros:
- ✅ Excellent torque production.
- ✅ Improved low-end and mid-range power.
- ✅ High-quality Edelbrock construction.
Cons:
- ❌ May not be the best choice for high-RPM horsepower.
- ❌ Can be more expensive than some alternatives.
- ❌ Port design is more suited for torque than peak horsepower.
Verdict: If you want to improve your truck's towing capacity or your car's street performance, these heads are a great choice. They deliver noticeable torque gains.
5. ProMaxx Performance 217cc Cylinder Heads
ProMaxx Performance 217cc heads are a versatile option. They are suited for street and mild performance applications. These heads offer a good balance of airflow and velocity for a broad powerband.
Pros:
- ✅ Versatile performance for street and mild builds.
- ✅ Good balance of airflow and velocity.
- ✅ Affordable price point.
Cons:
- ❌ May not be the best choice for high-horsepower builds.
- ❌ Some users report inconsistencies in machining.
- ❌ Requires careful attention to valve spring setup.
Verdict: These heads are a solid choice for a daily driver or weekend cruiser. They provide a noticeable improvement in performance without breaking the bank.
Buying Guide
Choosing the right heads for your LQ4 involves several factors. Consider your budget, performance goals, and intended use. Here are some tips to help you make the right choice:
- Budget: Determine how much you're willing to spend. Head prices can vary widely.
- Performance Goals: Are you looking for maximum horsepower, torque, or a balance of both?
- Intended Use: Will the engine be used for street driving, racing, or towing?
- Engine Modifications: Consider other modifications. These include camshaft, intake manifold, and exhaust system. Make sure the heads complement these upgrades.
- Valve Size: Larger valves generally improve airflow. But they may require more extensive modifications.
- Combustion Chamber Size: Choose a chamber size that matches your desired compression ratio.
- Material: Aluminum heads are lighter and dissipate heat better than iron heads.
- Professional Advice: Consult with a qualified engine builder or performance shop. They can offer personalized recommendations based on your specific needs.
Do your research. Read reviews and compare specifications. This will help you make an informed decision.
FAQs
What are the benefits of upgrading my LQ4 heads?
Upgrading your heads can significantly improve airflow, increasing horsepower and torque. You'll also see better throttle response and overall engine performance.
Can I install new heads myself?
Installing heads requires mechanical knowledge and specialized tools. If you're not comfortable, it's best to have a professional install them.
What other modifications should I consider when upgrading heads?
It's a good idea to upgrade your camshaft, intake manifold, and exhaust system. These upgrades will help you maximize the benefits of your new heads.
How do I choose the right combustion chamber size?
The combustion chamber size affects your engine's compression ratio. Consult with a professional to determine the optimal size for your build.
Are aluminum heads better than iron heads?
Aluminum heads are lighter and dissipate heat better. This makes them a better choice for performance applications. Iron heads are more durable and cost-effective for some builds.
Conclusion
Upgrading your LQ4 heads is a great way to improve performance. Consider your budget, goals, and intended use. You can find the perfect heads for your build. With the right heads, your LQ4 will run better. It will make more power too.
This site contains affiliate links. As an Amazon Associate, I earn from qualifying purchases. This means if you click on a link and buy a product, we may receive a small commission at no extra cost to you.
