799 Heads – A Detailed Overview

This article will explain all you need to know about the 799 heads.

A car’s cylinder head is a fantastic part that greatly contributes to the engine’s exceptional performance. Some cylinder heads, however, have an architecture that reduces the engine’s ability to produce power.

On the other side, certain cylinder heads have the best design and produce excellent power output with more horsepower.

The 799 head is one of them, kindly read on as we discuss the 799 cylinder head and what makes them a perfect fit for your porting needs.

So let’s take a closer look at the 799 heads and discover what makes them a good option for a porting project.

What are the 799 Heads

The 799 heads are one of the recent cylinder heads that were unveiled into the automotive marketplace. It design is a semi-permanent mold model.

Due to the similarity of the triangular casting marks, the 799 cylinder heads are comparable to the 2004 LS2 cylinder heads. However, they need not be polished like the 243 heads.

Users of 799 heads can employ vacuum and pressure testing to check the valve seating of the cylinder heads.

This aids in ensuring the dependability of the cylinder head’s channel. Keep in mind that a trustworthy channel will eventually ensure flawless compression.

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799 heads can have their valves replaced for greater efficiency.

Faults of the 799 Heads

The main obstacle to switching to 799 heads is the size of the combustion chamber. You must grind the cylinder heads to a limit of 0.025 in order to compensate for the decreased combustion chamber size that the cylinder heads originally had.

Even though porting to 799 heads has the benefit of producing more horsepower because of higher compression, you must make careful to weigh the benefits and drawbacks before making the switch.

799 Heads Properties

Here are some notable properties of the 799 heads

Compression 9.5:1 
Material Aluminium 
Exhaust port Design D-shaped  
Exhaust valve size 1.55 In 
Intake valve size 2.0 In 
Chamber diameter 3.867 
Exhaust port volume 74 CC 
Intake Port Volume 209 CC 
Intake Port Shape Architecture Cathedral 
Combustion chamber 64 CC 
Compatibility 4.8-litre and 5.3-litre truck engines. 
Target bore size 4.000 

Is 799 Heads any Good?

Yes, of course, they’re one of the best cylinder heads you can purchase in the automotive aftermarket at this time.

At specified lift positions, the 799 heads flow exceeds the 706 heads flow by up to 20 CFM. Cathedral and D-port, respectively, are the forms of the cylinder heads’ exhaust and intake ports.

The combustion chamber in the cylinder heads is smaller, which leads to increased compression and more horsepower.

799 Heads FAQs

What LS engines come with 799 Heads

Truck engines with 5.3L and 4.8L displacements are LS engines with 799 heads. The truck engines’ cylinder heads deliver outstanding performance. They have intricate construction, including a port with smaller combustion chambers in the shape of a cathedral.

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What does 799 Head Flow?

The 799 heads have a flow of 250.2 CFM at a 0.700-inch lift.

What Engines have the 799 Heads?

The 5.3-litre truck engine’s 799 heads are made of aluminium. Because of the compression ratio, the 5.3L stands out from other engines thanks to the 799 cylinder head. The 5.3-liter truck engine’s power output is also improved by the 799 heads.

Despite being designed for a 3.90-inch bore, the cylinder heads fit 5.3L and 4.8L blocks nicely (3.78-inch bore). 799 heads fit perfectly on 5.3 engines.


The 799 cylinder heads work great and due to their efficiency, you should notice a significant increase in the horse power of a vehicle.

However, check and balance the benefit s and dangers before switching to a 799 heads. You can reach out to your mechanic for a suggestion on which cylinder head is the best for your car.

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