All cylinder heads are priced each!

• L92 style rectangle port design
• Assembled with 2.000" intake and 1.550" exhaust valves
• 15° valve angle
• Minimum 3.890" bore
• 250cc “as-cast” intake ports, 80cc “as-cast” exhaust ports
• 65cc “as-cast” combustion chambers
• Responds well to larger valves
• Uses LS3 rocker arms/LS7 bolts

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

Four LSX street head configurations are offered: The LSX-LS7 head, the LSXLS3
head, the LSX-LS9 head and the LSX-L92 Small Bore head. The LSX-L92
head features smaller combustion chambers that are compatible with smallerbore
LS1 and LS6 engines. The street heads accommodate valve springs with
up to 1.55" diameter bases, but can be machined for larger springs.