Cylinder Head Style: Bare
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 68 cc
CNC-Machined Combustion Chamber: Yes
Intake Runner Volume (cc): 198 cc
Exhaust Runner Volume (cc): n/a
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Intake Port Shape: Cathedral
Intake Port Location: Standard
Exhaust Port Shape: Oval
Exhaust Port Location: Standard
Comp. Valve Job: No
Intake Valves Included: No
Intake Valve Diameter (in): 2.020 in.
Exhaust Valves Included: No
Exhaust Valve Diameter (in): 1.550 in.
Valve Springs Included: No
Damper Spring Included: No
Retainers Included: No
Locks Included: No
Valve Stem Seals Included: No
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Valve Cover Mounting Style: Perimeter Bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 15 deg.
Exhaust Valve Angle: 15 deg.
Valve Guides Included: Yes
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: NoÊ
Heat Crossover: No
Quantity: Sold individually.

TVR LS-series cylinder heads is rapidly expanding. The LS (Gen3/4) platform has many design benefits over the earlier SBC engine designs, most notably the cylinder heads. Although the GM heads are good pieces, We have developed a superior line of heads for modern performance enthusiasts. Like all TVR cylinder heads, the LS-series heads are produced using our "Gravity Casting" process. This process ensures a more uniform and robust casting, laying a strong platform to build on. Take a look below at our offerings, surely you will find a head to suit your application. If you require any additional information or help to select the correct cylinder head for your application, please feel free to call one of our techs.

Unlike most other Chevy V-8's, the LS-series engines utilize individual O-rings around each port to seal the intake manifold to the cylinder head. The LS1 / LS2 / LS6 style heads & manifolds use GM pn# 12533587 and the LS3 / L76 / L92 style heads use GM pn# 1290125. On the Exhaust side of the head, all non-LS7 heads utilize the same MLS header gasket. The part number of the exhaust gasket is GM pn# 12901125.

TVR is currently working on a line of MLS exhaust/header gaskets. Check with our sales staff to see if we have an MLS exhaust gasket available for your application.

Because there are so many different bore sizes for engines in the LS-series, below you will find a list of TVR and Fel-Pro head gasket part numbers and their bore size:

Bore Size TVR MLS# Fel-Pro#
3.945" SM5221(pr.) 1160L/R (ea.)
4.050" SM5222(pr.)
4.100" SM5223(pr.) 1161L/R (ea.)
4.170" SM5224(pr.) 1162L/R (ea.)

These TVR MLS head gaskets feature 100% stainless steel construction. We don't use inferior mild steel like some other aftermarket gasket suppliers. To aid in sealing, both outer layers of our MLS gaskets are covered with a high-temperature coating. You won't find a better value in head gaskets for an LS anywhere.

Unlike the early GM heads, TVR heads use common length head bolts/studs. Starting in 2004, GM heads went to the same common length head bolt arrangement. By using bolt/stud registers that are all the same thickness, equal clamp load is created all the way around each cylinder. Our part number for the correct head stud kit is SM2464.

The ARP part numbers that work with our LS-series heads are # 134-3610 (bolts) and #23-4317 (12pt. stud kits)


Torque the 11mm. bolts / studs to 65lbs and the 8mm bolts / studs to 20lbs. using high-pressure moly lubricant.
*Please consult your hardware supplier for their specific torque recommendations!

Be careful with your selection of sparkplugs in the LS-series engines. The OEM plug is an NGK TR5. We recommend that you use NGK TR6 sparkplugs on performance-oriented engines. If you require a sparkplug colder that a 6 heat range, you will have to switch away from resistor style plugs, and into the NGK R5724-7 or R5724-8. These colder plugs don't have an internal resistor, so they may cause some slight RF interface. Usually, it's not a problem unless you have a really sensitive aftermarket ECU, and even then it's not normally a problem.

If you prefer Autolite sparkplugs, use the AR103 for street/strip performance engines. The AR94 is quite a bit colder for those of you looking to squeeze N20 or heavy boosted engines.

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Reviews Over Chevy LS1 LS6 198cc 68cc Full CNC Bare Aluminum Cylinder Head

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Chevy LS1 LS6 198cc 68cc Full CNC Bare Aluminum Cylinder Head

  • $595.98

Tags: cylinder.head, cylinder heads, heads, CNC, cast, ford, chevy