LSX-LS3 Cylinder Head, Assembled

Name: LSX-LS3 Cylinder Head, Assembled
Brand: CHEVROLET PERFORMANCE
SKU: 809-19419187
Price: 1855.36 USD
Availability: InStock

^$1,855³⁶

Ships on 09/30/2026

Lowest Price Guarantee

260cc Intake Port / 80cc Exhaust Port
70cc Combustion Chamber
2.165'' Intake Valve / 1.590'' Exhaust Valve
Assembled, Sold Individually

19419187 supersedes 19354243

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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Extending the performance range of the LSX platform are Chevrolet Performance's 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 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
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.
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 1.37'' diameter bases, but can be machined for larger springs.
LSX-LS3 Cylinder Head
L92 style rectangle port design
Assembled with 2.165'' hollow stem intake and 1.590'' solid stem exhaust valves
15? valve angle
Minimum 4.000'' bore
260cc ''as-cast'' intake ports, 80cc ''as-cast'' exhaust ports
70cc ''as-cast'' combustion chambers
Uses LS3 rocker arms/LS7 bolts