Cylinder Heads

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EngineQuest, your home for new OE type replacement and performance engine parts and cores. For our full line of products, visit or call 1-800-426-8771. EngineQuest – The Name You Trust for Engine Parts, Cores, And Recycling.

Are you a car enthusiast, an engine rebuilder, or just someone who loves quality engine parts? Well, listen here because we've got something special for you! Introducing EngineQuest Cylinder Heads – the ultimate choice for top-notch cylinder heads that set us apart from the competition!

EngineQuest offers close to a hundred brand new cylinder head part numbers! Made from the highest-grade cast iron and aluminum, these heads are built to last, with a thicker deck for greater strength and an improved design that resists cracking.

But that's not all! Our cylinder heads boast superior port finishes, increasing airflow, and greater thermal conductivity with an improved water flow redesign. Plus, we've got hardened exhaust seats and a 3-angle valve finish for enhanced performance.

Quality is our top priority! Each head undergoes a rigorous 25-point quality check, ensuring every head meets our stringent standards.

And here's the best part – you can get all these features at a competitive price! EngineQuest makes top-tier performance accessible to everyone.

Whether you prefer the convenience of an assembled head or like to customize your valve train, EngineQuest has you covered. Our bare cylinder heads are ready to install your valve train right out of the box.

And for those who want the complete package, our assembled heads come with 100% new OE type valves, seals, valve springs, locks, and retainers. All of our cylinder heads are assembled in-house, in our North Las Vegas facility, with the highest quality standards, and are backed by our INDUSTRY LEADING limited parts and labor warranty.

Let's take a closer look at five of our top-performing cylinder heads!

Let's kick things off with our LS OE type replacement cylinder heads – a remarkable trio catering to different LS engines. Among them, we proudly offer two cathedral port options tailored for cast numbers 317 and 243 (EQ-CH364A and EQ-CH364B), along with a dynamic rectangle port alternative designed for cast number 364 (EQ-CH364C). Regardless of your engine type, these cylinder heads are crafted to impeccable standards, providing your engine with the enhancement it truly deserves.

Moving to our redesigned LS3 hybrid cylinder head EQ-CH364X. It's an LS3-based head with an LS7 intake runner, giving you increased airflow and power. Use your stock LS3 valve train and bolt on the LS7 intake runner for a serious performance boost. The head is available bare, assembled, and CNC machined, and guess what? It was even featured in Hot Rod Magazine.

Next, we have the EQ-CH350I – IMCA and WISSOTA’s go-to sanctioned sport mod head for the 5.7 Chevy. Trusted in the circle track community and used in WISSOTA racing and IMCA, these heads are engineered for excellence. Get them bare or fully assembled – the choice is yours!

Moving on, let’s talk about the good old-fashioned Chevrolet Small Block in 5.0L and 5.7L, available for both automotive and marine applications. The EQ-CH305B 5.0L and EQ-CH350C 5.7L Vortec cylinder heads with hardened valve seat inserts are perfect for providing durability and performance like no other.

And that's not all – for the Jeep aficionados. Introducing the EQ-CH242N, the ultimate cylinder head for Jeep 4.0L engines spanning from 1998 to 2006, and featuring a replacement cast number for 331. If you're a Jeep enthusiast looking to elevate your ride's performance, this cylinder head is tailor-made for you.

Last but not least, we've got the EQ-CH345 – the new EngineQuest Dodge Hemi 5.7-cylinder head with 02-08 year applications. Whether you need the driver or passenger side, bare or assembled, when it comes to Hemi performance, this cylinder head takes the lead!

So, whether you're a seasoned engine rebuilder or a passionate car enthusiast, EngineQuest Cylinder Heads deliver unmatched performance and durability at a competitive price. Visit or contact us today at (800) 426-8771 to get your hands on the ultimate cylinder heads from EngineQuest. Elevate your engine's performance to new heights!

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