Best Heads For Ls3: Compare Bare, Assembled, and CNC-Ported Options

#1 · Best Overall

1. JEGS 514050 Head

• Weight: 26.9 lb

Best for: As-Cast Individual LS3 Head.

Why it ranks #1: This explicitly LS3-listed head specifies a 260cc intake runner, 70cc chamber, and 2.165-inch intake valves; it suits a 4-inch-or-larger bore.

A 260cc as-cast intake runner makes the JEGS 514050 a clear option for buyers comparing an individual LS3 cylinder head by port volume. Its 70cc chamber, 2.165-inch intake valve, and 1.59-inch exhaust valve add concrete sizing details for planning a compatible engine combination.

JEGS lists this head for 2001–2015 GM LS3 applications and specifies use with LS engines having a 4-inch or larger bore. The 260cc as-cast intake runner and 70cc as-cast chamber define its flow-path and chamber characteristics, while the stated valve diameters support component planning. Sold individually, it can suit a one-head replacement or a build sourcing heads separately; the bore threshold and as-cast specification should guide fit and preparation decisions.

Skip it if you have an LS engine with less than a 4-inch bore or need a pair supplied together.

Select this JEGS head for an LS3 buyer whose engine meets the 4-inch-or-larger bore requirement and who needs one head. Its as-cast runner and chamber are important preparation considerations.

Listed on Amazon as: JEGS 514050 Cylinder Head 2001-2015 GM LS3

#2 · Best CNC-Ported Pair

2. BTR CVH3C-6A Heads

• Weight: 30 lb

Best for: CNC-Ported LS3 Upgrade.

Why it ranks #2: The assembled pair has CNC-finished 260cc runners, 64cc chambers, and reported airflow above 370 CFM at .650-inch lift, but requires canted-valve compatibility.

Canted valves set the BTR CVH3C-6A apart, giving compatible Gen III and Gen IV LS builders a different head layout paired with LS3-style rectangle-port dimensions. Its CNC-finished 260cc intake runners and reported airflow above 370 CFM at .650-inch lift make the port work a defining specification for performance-focused builds.

The assembled pair arrives with machined, CNC-ported heads, finished valve guides and seats, so the buyer receives more than bare castings. Each head has a 260cc rectangle intake runner and 64cc chamber, while the stated minimum bore is 3.820 inches; those dimensions help narrow compatibility checks before installation. BTR reports more than 370 CFM at .650-inch valve lift. Confirm the engine and bore meet the listed requirements, especially because this canted-valve setup is not a generic LS3 head choice.

Skip it if you need a standard stock-style LS3 replacement rather than a canted-valve, CNC-ported performance pair.

Choose this assembled pair for a compatible Gen III or Gen IV LS build where canted valves and CNC-ported rectangle runners suit the plan. Check the 3.820-inch minimum bore and engine configuration before committing.

Listed on Amazon as: BTR Brian Tooley Racing CVH LS3 CNC-Ported Canted Valve Cylinder Heads Pair | Fits Gen III IV LS V8 Engines with LS3 Rectangle Port Components and 3.820-Inch Bore | Assembled 64cc Chambers

#3 · Best Remanufactured Pair

3. Renewed 823 Head Pair

Best for: Renewed Stock-Style Head Pair.

Why it ranks #3: This stock-style remanufactured set includes two assemblies with rocker arms and pedestal stands, plus 70cc chambers and 257cc intake ports.

Two remanufactured OE-stock head assemblies with rocker arms and pedestal stands make this renewed set the group’s listed pair option for an LS3/L92-style replacement. Hot-tank cleaning, pressure testing, and valve-work details give buyers concrete refurbishment information alongside the included assembly components.

The set is identified for LS3, L92, 6.0L, and 6.2L applications, with 70cc chambers and 257cc intake port volume stated in the description. Hot-tank cleaning and pressure testing address casting integrity, while seats, seals, and guides are replaced as necessary. A performed valve job and vacuum-tested seals provide further process details. With rocker arms and pedestal stands on both assemblies, the pair suits buyers seeking more complete stock-style replacements than bare heads.

Skip it if you need CNC-ported performance heads rather than stock-style remanufactured assemblies.

This pair suits an LS3, L92, 6.0L, or 6.2L stock-style replacement needing two assemblies with rocker arms and pedestal stands. Check that the stated chamber and port volumes match the intended build.

Listed on Amazon as: GM LS3 L92 6.0L 6.2L Cylinder Heads REMANUFACTURED 823 Square Port Assembly w/Rocker Arms PAIR 823 ; 821 ; 5364 ; 12600936 ; 12629062 ; 126269064 SET (Renewed)

#4 · Best Single Assembly

4. Renewed 823 Head

Best for: Renewed Stock-Style Assembly.

Why it ranks #4: The remanufactured single head includes rocker arms and a pedestal stand; its listed stock-style specifications include a 70cc chamber and 257cc intake port.

A renewed single 823-style head includes rocker arms and a pedestal stand, giving a stock-replacement project more of the assembly than a bare casting provides. Its documented cleaning, pressure testing, valve work, and inspection offer useful process details for buyers evaluating a remanufactured LS3 or L92 cylinder head.

The listing identifies this as one remanufactured OE-stock head for LS3, L92, 6.0L, and 6.2L applications, with rocker arms and pedestal stand included. Cleaning by hot tank and pressure testing address casting integrity, while new seals and replacement guides as necessary support the refurbishment workflow. The performed valve job and vacuum-tested seals are practical details for a buyer seeking an inspected assembly, but the quantity is one head, not a pair.

Skip it if you need two heads in one purchase; the Amazon Renewed 823 remanufactured pair is listed as a set.

Consider this renewed single assembly for an LS3, L92, 6.0L, or 6.2L stock-style replacement when rocker arms and a pedestal stand matter. Verify that one head matches the quantity your repair requires.

Listed on Amazon as: GM LS3 L92 6.0L 6.2L Cylinder Head REMANUFACTURED 823 Square Port Assembly with Rocker Arms 823 ; 821 ; 5364 ; 12600936 ; 12629062 ; 126269064 (Renewed)

#5 · Best Bare Pair

5. IMOOA Bare Heads

Best for: Bare Replacement Head Pair.

Why it ranks #5: This bare pair is listed for LS3 and L92 6.0L and 6.2L engines, with 265cc intake runners, 70cc chambers, and bronze valve guides.

A bare aluminum pair with 70cc chambers and 265cc intake runners gives LS3 and L92 builders a clearly dimensioned starting point for a replacement-head project. The listed 2.165-inch intake and 1.590-inch exhaust valve diameters also make it easier to compare the heads with the engine’s intended valve configuration.

The pair is specified for GM LS3, L92, 6.0L, and 6.2L engines, while the 70cc chambers and 265cc runners identify its principal sizing. High-grade aluminum construction is paired with bronze valve guides and ductile iron seats, which are relevant details when assessing the head’s materials and valve-train interfaces. Because the listing calls these bare heads, buyers should plan around the required assembly work rather than expect a ready-to-install assembled pair.

Skip it if you need assembled heads with rocker arms included; the GM 823 renewed assembly from Amazon Renewed is a more complete listed option.

This pair suits an LS3 or L92 builder sourcing bare aluminum heads and checking valve dimensions against a planned setup. It is not an assembled replacement, so account for the additional preparation and installation work.

Listed on Amazon as: One Pair Bare Cylinder Heads For GM LS3 L92 6.0L 6.2L Aluminum

#6

6. Pateyney LS3 Head

• Weight: 31.6 lb

Best for: Single Bare Rectangle-Port Head.

Why it ranks #6: The single bare head lists rectangular intake ports, 260cc runners, and a 70cc chamber, but its combustion chamber and runners are not CNC-machined.

A standard-location rectangular intake port and oval exhaust port give this single Pateyney head a defined LS3-style layout for a replacement or custom build. The 260cc intake runner and 70cc chamber let buyers compare its key dimensions with the planned engine setup before taking on a bare-head project.

This aluminum head is sold individually, and its standard intake and exhaust port locations support a direct comparison with compatible layout requirements. The 260cc intake runner and 70cc combustion chamber specify the principal flow-path and chamber dimensions. The listing also states that neither the intake runner nor combustion chamber is CNC-machined, making the head a better match for buyers who want an as-cast starting point and can handle any additional preparation their build requires.

Skip it if you want CNC-machined ports or chambers; the Pateyney listing specifies that neither is CNC-machined.

Choose this individual head when an as-cast rectangular-port aluminum casting and stated 260cc/70cc dimensions fit the build. It is not a pair, and its intake runner and chamber are not CNC-machined.

Listed on Amazon as: Aluminum LS3 Cylinder Head for GM 6.0L 6.2L L92 CNC Bare Single Rectangle Port

#7

7. PUFFIS LS3 Head

Best for: Bare 260cc Port Replacement.

Why it ranks #7: This bare LS3/L92-style head specifies 260cc intake runners and a 70cc chamber, though the chamber is not CNC-machined and one head is supplied.

Rectangular intake ports paired with oval exhaust ports give this PUFFIS bare head a defined LS3/L92-style port layout for compatible 6.0L and 6.2L applications. Its 260cc intake runner and 70cc chamber provide key sizing information for buyers comparing a replacement casting with their engine configuration.

The listed standard port locations and rectangular intake/oval exhaust shapes help identify the intended LS3/L92-style application before a build. A 260cc intake runner and 70cc chamber further define the head’s dimensions, while the natural aluminum finish keeps the description straightforward. The combustion chamber is explicitly non-CNC-machined, and this is a bare cylinder head, so it suits buyers arranging the remaining preparation and assembly rather than seeking a complete assembled head.

Skip it if you need a CNC-machined chamber or an assembled head ready to install; this listing specifies a bare, non-CNC-machined casting.

This PUFFIS head fits a buyer sourcing a bare LS3/L92-style casting with specified port shapes and chamber volume. Check the engine configuration and plan for its non-CNC chamber and separate assembly needs.

Listed on Amazon as: Bare Cylinder Head Compatible with GM LS3 L92 6.0L 6.2L, 70cc, 260cc

#8

8. Remanufactured 823 Head

• Weight: 32 lb

Best for: Remanufactured Stock Replacement.

Why it ranks #8: The remanufactured stock-style single head includes rocker arms and a pedestal stand, but the listing offers less clarity than the renewed equivalent.

Rocker arms and a pedestal stand are included with this remanufactured single LS3/L92-style head, reducing the number of listed assembly pieces a stock-replacement buyer must source separately. Its cleaning, pressure testing, valve work, and inspection steps provide specific refurbishment information for evaluating the OE-stock assembly.

The listing covers a single OE-stock head for LS3, L92, 6.0L, and 6.2L applications, with a 70cc chamber and 257cc intake port volume. Hot-tank cleaning and pressure testing address casting integrity, while valve seats, stem seals, and guides receive replacement as needed. A performed valve job and vacuum testing of seals add concrete refurbishment steps; the included rocker arms and pedestal stand make the package more complete than a bare head, but it remains one head.

Skip it if you need a matched set in one purchase; the Amazon Renewed 823 assembly pair is listed as two heads.

This is a fit for a buyer replacing one stock-style LS3/L92 head and wanting rocker arms and a pedestal stand included. Check the listed engine application and remember the package contains one head.

Listed on Amazon as: REMANUFACTURED Cylinder Head Compatible with GM LS3 L92 6.0L 6.2L 823 Square Port Assembly with Rocker Arms 823 ; 821 ; 5364 ; 12600936 ; 12629062 ; 126269064