LSX-SC Bare Cylinder Head – As Cast


  • Used with COPO 350 Supercharged engine
  • Un-ported casting accommodates additional porting and machining
  • Hot Isostatic Pressing for enhanced strength and density
  • Competition use only


SKU: 19417408 Categories: ,

LSX-SC Bare Cylinder Head – As Cast

19417408 Chevrolet Cylinder Head

– Made of T356 aluminum with low-pressure casting and Hot Isostatic Pressing for enhanced strength and material density
– Un-ported casting with smaller water jackets to accommodate additional porting and machining.
– Valve seats and valve guides included, but delivered uninstalled

Note: Intended for competition use only.


LSX-SC Bare Cylinder Head – As Cast

19417408 Chevrolet Cylinder Head

Chevrolet Performance’s LSX-SC cylinder head is an enhanced version of the LSX head design and was developed for the COPO 350 Supercharged production engine. It is designed specifically for the higher cylinder pressures that come with high-boost forced induction applications.

The LSX-SC is based on the proven, high-flow LSX-LS7 design, but optimized in key areas to enhance strength and cylinder sealing for engines producing upwards of 1,400 horsepower. Like other LSX cylinder heads, it is made of tough T356 aluminum, but produced with a low-pressure casting process to improve density. Additionally, the head is treated to Hot Isostatic Pressingラcommonly known as “HIPing”ラto optimize the aluminum alloy’s mechanical properties and density.

Additionally, the head’s water jacket has been reduced to shore up its strength, compared to the LSX-LS7 head, which leaves more room for builders to machine the ports separately.

Additional details:
ユ LSX-signature six-bolts-per cylinder head clamping
ユ LS7-style rectangular port design (use with LS7-compatible intake manifold)
ユ Combustion chamber volume: 68cc
ユ Intake port volume: 277cc
ユ Exhaust port volume: 99cc
ユ Same 12ᄚ valve angles as LSX-LS7 head
ユ Valve seats are 45ᄚ (intake) and 50ᄚ (exhaust)
ユ Valve pockets machined at 37mm-diameter (with sufficient room to machine larger)
ユ LSX-LS7 exhaust bolt pattern (use with LS7-compatible headers), but bolt holes are raised .100″. for improved header/gasket centering
ユ Use with standard LSX-compatible head gaskets
ユ Designed for LS7 rocker arms and bolts, but can be machined for shaft-style rockers
ユ Designed for LSX 2.20″. (intake) and 1.61″. (exhaust) valves

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to