All cylinder heads are priced each!

• 356-T6 aluminum racing head
• 5/8" thick deck
• LSX-CT rectangle-intake port design—requires LSX-CT or LSX-DR
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
• Fully CNC-ported
• 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!

Extending the performance range of the LSX platform are GM Performance
Parts’ new, 6-bolt LSX cylinder heads. Many are capable of flowing more than
400 cfm and their 6-bolts-per-cylinder clamping design gives them bombproof
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 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, see drawing on
page 205)
• 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

The LSX-CT (Circle Track) and LSX-DR (Drag Racing) cylinder heads feature
raised-runner designs for improved airflow that supports sustained high-rpm
performance. 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-degree valve angle (same as C5R head)
• Accomodates up to 1.660" diameter valve springs
• Raised rocker rails
• Requires shaft-mount rockers (see P/N 19201808)
• 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