19419187 - LSX-LS3 Cylinder Head

LSX CYLINDER HEADS

Extending the performance range of the LSX platform are GM Performance Parts new, six-bolt LSX cylinder heads. Many are capable of flowing more than 400 cfm and their six-bolts-per cylinder clamping design gives them bomb-proof strength. Your horsepower-building potential is nearly unlimited with LSX ends. 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 thick, 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 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 Street Heads Four LSX street head configurations are offered: The LSX-LS7 head, the LSX-LS3 head, the LSX-LS9 head and the LSX-L92 Small Bore head. The LSX-L92 head features smaller combustion chambers that are compatible with smaller-bore LS1 and LS6 engines. The street heads accommodate valve springs with up to 1.55" diameter bases, but can be machined for larger springs.

19201805 LSX-LS3 Cylinder Head Features: L92 style rectangle port design Assembled with 2.165" hollow stem intake and 1.59" solid stem exhaust valves 15 valve angle Requires a minimum 4.00" bore for valve clearance 260cc "as-cast" intake ports, 80cc "as-cast" exhaust ports 70cc "as-cast" combustion chambers