Best LS Cylinder Heads for Boost Applications

So, you’re boosting your LS engine? Fantastic! I’ve been there, and let me tell you, choosing the right cylinder heads is crucial. Get it wrong, and you risk blown gaskets, warped heads, or even a catastrophic engine failure. Get it right, and you’ll unlock serious power gains. This guide breaks down some of the top LS cylinder heads for boosted applications, drawing on my own experience and research to help you make the best choice for your build. We’ll cover everything from complete heads to essential supporting components like gaskets and studs. Let’s dive in!

IMAGE	PRODUCT NAME	AMAZON LINK
	GM LS3 L92 6.0L 6.2L Cylinder Heads REMANUFACTURED 823…	View on Amazon
	EngineQuest GM LS Cylinder Head #5364, 821, 823 | Bare…	View on Amazon
	BTR Brian Tooley Racing MLS LS3 Cylinder Head Gasket Pair…	View on Amazon
	PQY 12-Point Cylinder Gasket Head Stud Bolts Nuts Kit…	View on Amazon
	Michigan Motorsports LS3 Head Gasket & 2005+ Head Bolt…	View on Amazon
	4pcs Cylinder Head Pin, Cylinder Head Dowels Pin Fits for…	View on Amazon
	YZQPNB 12-Point Cylinder Gasket Head Stud Bolt Kit…	View on Amazon

GM LS3 L92 6.0L 6.2L Cylinder Heads REMANUFACTURED 823…

These remanufactured heads offer a cost-effective way to upgrade your LS engine. They’re a good starting point if you’re on a tighter budget but still want decent performance. The process of remanufacturing involves a thorough cleaning, inspection, and replacement of worn components. However, keep in mind that performance might not be quite as high as brand-new, purpose-built heads.

• Complete disassembly and cleaning
• New valve seats and stem seals
• Valve job performed
• Vacuum tested for compression

Pros:
– Affordable
– Decent performance for the price
– Meets AERA specifications

Cons:
– Not as high-performance as some dedicated aftermarket heads
– Remanufactured, so performance varies slightly between units

User Feedback Summary: Many users report good results for street use and milder boost levels. Some experienced issues with longevity under extreme boost pressures.

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EngineQuest GM LS Cylinder Head #5364, 821, 823 | Bare…

EngineQuest offers a solid bare cylinder head option. “Bare” means you’ll need to source and install your valves, springs, and other components. This gives you ultimate control over your build, but it also requires more mechanical expertise. The design emphasizes durability and improved flow characteristics compared to stock heads.

• Premium aluminum construction
• Optimized water flow and thicker deck
• 65cc chamber volume, 258cc intake port, 87cc exhaust port
• Fits various GM LS engines (6.0L/6.2L)
• 1-year warranty

Pros:
– Strong and durable
– Good airflow for boost applications
– Customizable

Cons:
– Requires additional parts and expertise to assemble
– Not the most advanced design available

User Feedback Summary: Generally positive reviews from users who appreciate the quality and build. A few reports of minor fitment issues, but mostly resolved through adjustments.

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BTR Brian Tooley Racing MLS LS3 Cylinder Head Gasket Pair…

Brian Tooley Racing is a well-respected name in the LS performance world, and their head gaskets are no exception. These multi-layer steel (MLS) gaskets are essential for any boosted build, providing a reliable seal under high pressure. Don’t skimp on gaskets; these are the foundation of your engine’s ability to withstand boost.

• Multi-layer steel construction
• Designed for 6.0L & 6.2L LS rectangle port engines
• Ideal for boosted and high-compression setups

Pros:
– Excellent sealing ability under boost
– Durable and reliable
– Trusted brand within the performance community

Cons:
– More expensive than standard gaskets
– Needs proper torque and installation

User Feedback Summary: Extremely positive feedback; users consistently praise the reliability and leak-free performance, even under extreme conditions.

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PQY 12-Point Cylinder Gasket Head Stud Bolts Nuts Kit…

Upgrading your head studs is another critical aspect of boosted LS builds. Factory bolts often aren’t strong enough to handle the increased cylinder pressure, leading to head gasket failure. These 12-point studs provide increased clamping force and strength. Note the specific compatibility listed.

• 12-point head studs and bolts
• High tensile strength
• Fits specific GM applications (check compatibility!)

Pros:
– Stronger than factory bolts
– Improves head gasket sealing under boost

Cons:
– Requires specific knowledge for installation
– May not fit all LS engines (check compatibility)

User Feedback Summary: Most users report improved reliability and the elimination of head gasket leaks after installation. Some minor fitment issues have been reported on certain models.

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Michigan Motorsports LS3 Head Gasket & 2005+ Head Bolt…

This kit combines a high-quality MLS head gasket with the necessary head bolts—a convenient and effective package. Again, the focus here is on preventing leaks and maintaining a consistent seal under pressure.

• 5-layer MLS gaskets
• Includes 2005+ LS head bolts
• Fits various 6.0L & 6.2L LS engines

Pros:
– Convenient kit with everything you need
– Strong sealing ability
– Suitable for both naturally aspirated and boosted applications

Cons:
– Slightly more expensive than buying gaskets and bolts separately.

User Feedback Summary: A reliable and well-reviewed kit, providing users with a hassle-free upgrade for their head gasket and bolts.

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4pcs Cylinder Head Pin, Cylinder Head Dowels Pin Fits for…

These dowel pins are small but important parts that ensure proper alignment of the cylinder heads. While seemingly minor, using worn or damaged dowels can lead to installation issues and potential leaks.

• Easy to install
• Made of high-quality CNC materials
• Direct replacement for old or broken pins

Pros:
– Essential for proper head alignment
– Inexpensive

Cons:
– Small, easily lost part
– May not be needed for all builds

User Feedback Summary: Usually purchased as part of a larger rebuild, this product receives positive feedback for its quality and functionality.

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YZQPNB 12-Point Cylinder Gasket Head Stud Bolt Kit…

Similar to the PQY kit, this offering provides upgraded head studs for increased clamping force. Always verify fitment before purchase as compatibility is crucial.

• 12-point head studs and bolts
• Made of high tensile strength chromoly steel
• Fits various LS engines (check compatibility!)

Pros:
– Increased clamping force
– Durable construction
– Improves head gasket sealing

Cons:
– Requires specific knowledge and tools for installation
– Check compatibility before buying

User Feedback Summary: Users generally report positive experiences with improved head gasket sealing and increased reliability. As with other stud kits, ensuring proper torque is essential for optimal performance and preventing damage.

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Practical Buying Advice

Choosing the right LS cylinder heads for boost depends heavily on your budget and the level of boost you plan to run. For mild boost (under 10 psi), remanufactured heads or even well-maintained stock heads might suffice with upgraded gaskets and head studs. For more significant boost levels, dedicated aftermarket heads are recommended. Always prioritize high-quality MLS head gaskets and upgraded head studs regardless of your head choice. Proper installation is paramount; if unsure, seek professional help.

FAQ

Q: What is the difference between MLS and composite head gaskets?
A: Multi-Layer Steel (MLS) gaskets are significantly stronger and better suited for high-boost applications, offering superior sealing and durability. Composite head gaskets are generally cheaper but less robust.

Q: Do I need to upgrade my head studs when boosting my LS engine?
A: Yes, almost always. Factory head bolts are often not strong enough to withstand the increased cylinder pressure of a boosted engine, increasing the risk of head gasket failure.

Q: What is the importance of proper head gasket torque?
A: Inaccurate torque can lead to leaks, head gasket failure, or even warped cylinder heads. Use a calibrated torque wrench and follow the manufacturer’s instructions precisely.

Q: Can I use stock LS cylinder heads with a mild boost setup?
A: With upgraded head gaskets and head studs, you might get away with stock heads for mild boost (under 10 psi), but it’s not ideal. The longevity will likely be diminished compared to dedicated aftermarket heads.

Q: How much horsepower can I realistically gain with upgraded cylinder heads and supporting components?
A: The horsepower gains vary widely depending on the specific components, your engine’s setup, and your tuning. Generally, you can expect significant gains, with gains well into the 100+ horsepower range depending on your set up.

Q: What are some common signs of a failing head gasket?
A: Common signs include coolant in the oil, oil in the coolant, white smoke from the exhaust, loss of coolant, and inconsistent cylinder compression.

Remember, building a boosted LS engine requires careful planning and attention to detail. Using the right components and executing a clean install is crucial for reliability and optimal performance. This guide is a starting point; always do additional research based on your specific engine build and goals.