This has been superseded by P/N 19330896.

LSX-CT CNC-Ported Cylinder Head

LSX Cylinder Heads

Extending the performance range of the LSX platform are Chevrolet Performance 6-bolt LSX cylinder heads. Many are capable of flowing more than 400 cfm and their 6-bolts-per-cylinder clamping design gives them bomb-proof strength. Your horsepower-building potential is nearly unlimited with LSX heads.

These aluminum masterpieces of performance feature port and chamber designs based on popular and performance-proven production-style heads, such as the LS3/L92 and LS7 heads. They are easily identified by the engraved LSX logo on the ends.

All LSX heads are made of 356-T6 aluminum and feature a 5/8" thick deck that allows plenty of room for builder-specified combinations.

Additional features include:

• Uses 11mm (10) and 8mm (13) head bolts (not included)
• Accommodates production valvetrain components (except for Drag Race and Circle Track heads)
• Includes premium beehive-type valve springs (except for Drag Race and Circle Track heads)
• Extra material cast in the port areas to accommodate professional porting
• Valve guides for 8mm valve stems, except DR & CT Racing-specific LSX-DR (Drag Racing) and LSX-CT (Circle-Track) heads feature raised runner designs and other unique features designed to maximize performance at the track.

Racing-specific LSX-DR (Drag Racing) and LSX-CT (Circle-Track) heads feature raised runner designs and other unique features designed to maximize performance at the track.

LSX-DR and LSX-CT Heads

The LSX-CT (Circle Track) and LSX-DR (Drag Racing) cylinder heads feature raised-runner designs for improved airflow. Intake port configuration is similar to the competition-derived C5R head, but the ports are raised an amazing 10mm and the intake manifold bolt pattern is spread to accommodate additional port configurations.

Additional features include:

• 11 ° valve angle (same as C5R head)
• Accommodates up to 1.660" diameter valve springs
• Raised rocker rails
• Requires shaft-mount rockers
• May require special valve covers to clear shaft-mount rockers
• Provisions for down-nozzle machining
• 9 ° intake manifold angle - requires new LSX DR or LSX CT intake manifolds
• Unique LSX-CT/DR exhaust bolt pattern

19166981 Chevrolet Cylinder Head

• Fully CNC-ported
• 356-T6 aluminum racing head
• 5/8" thick deck
• LSX-CT rectangle-intake port design - requires LSX-CT intake manifold
• LSX-CT/DR spread-port exhaust port pattern
• Cast-in down-nozzle bosses (not machined)
• Designed for 2.200" intake and 1.610" exhaust valves
• Machined for 1.625" valve springs
• 11 ° valve angle
• Minimum 4.125" bore
• 302cc CNC'd intake ports
• 109cc CNC'd exhaust ports
• 45cc CNC'd combustion chambers
• Capable of over 850 naturally aspirated horsepower!