L92 Cylinder Head Assembly
$809.70
Great cylinder-head airflow has been a key enabler of the LS-Series‘ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads – from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from GM‘s extensive research and development program, ensuring maximum airflow without compromises. In fact, many professional builders use our heads as straight bolt-ons, with no further machining. Many of our assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem valves, sodium-filled exhaust valves and – on some heads – lightweight titanium intake valves.
Note: Chevrolet Performance heads will not fit 4.8L and 5.3L engines, due to their smaller bore sizes.
Aluminum LS Family Head Technical Notes:
- Manufactured from 319-T5 aluminum alloy
- High-efficiency combustion chambers
- Symmetrical intake and exhaust ports
- Angled spark plugs (14mm; 5/8″ hex; 3/4″ reach; taper-seat plugs)
- 15° valve angle (except C5R and LS7)
- Bolt-down-type rocker arms (except LSX-DR, LSX-CT)
- Center-bolt valve cover hold-downs
- Fits Gen III and Gen IV Small Blocks only
12629064 Chevrolet Cylinder Head
- Aluminum performance head
- Fits any LS family engine with 4.000″ bore or larger
- 2.165″ hollow stem intake, and 1.590″ solid stem exhaust valves
- .550″ max valve lift
- As-cast L92 style intake ports
- D-shaped exhaust ports
- As-cast combustion chambers
- Uses bare head P/N 12629051
Head P/N 12629064 is assembled with the following:
- 12627970 Intake Valves
- 10166344 Valve Spring Retainers
- 12582719 Exhaust Valves
- 12482063 Intake Valve Stem Seals
- 12589774 Valve Springs
- 12482062 Exhaust Valve Stem Seals
- 10166345 Valve Locks.
Additional required components:
- 12610046 (2) or 19170419 (1) Gaskets
- 11562524 (20) Bolts
- 12558840 (10) Bolts
- 12571164 Spark Plugs
Engine application: L9H
L92 Cylinder Head Assembly
LS Family Production and C5R Aluminum Heads
Great cylinder-head airflow has been a key enabler of the LS-Series‘ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads – from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from GM‘s extensive research and development program, ensuring maximum airflow without compromises. In fact, many professional builders use our heads as straight bolt-ons, with no further machining. Many of our assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem valves, sodium-filled exhaust valves and – on some heads – lightweight titanium intake valves.
Note: Chevrolet Performance heads will not fit 4.8L and 5.3L engines, due to their smaller bore sizes.
Aluminum LS Family Head Technical Notes:
- Manufactured from 319-T5 aluminum alloy
- High-efficiency combustion chambers
- Symmetrical intake and exhaust ports
- Angled spark plugs (14mm; 5/8″ hex; 3/4″ reach; taper-seat plugs)
- 15° valve angle (except C5R and LS7)
- Bolt-down-type rocker arms (except LSX-DR, LSX-CT)
- Center-bolt valve cover hold-downs
- Fits Gen III and Gen IV Small Blocks only
12629064 Chevrolet Cylinder Head
- Aluminum performance head
- Fits any LS family engine with 4.000″ bore or larger
- 2.165″ hollow stem intake, and 1.590″ solid stem exhaust valves
- .550″ max valve lift
- As-cast L92 style intake ports
- D-shaped exhaust ports
- As-cast combustion chambers
- Uses bare head P/N 12629051
Head P/N 12629064 is assembled with the following:
- 12627970 Intake Valves
- 10166344 Valve Spring Retainers
- 12582719 Exhaust Valves
- 12482063 Intake Valve Stem Seals
- 12589774 Valve Springs
- 12482062 Exhaust Valve Stem Seals
- 10166345 Valve Locks.
Additional required components:
- 12610046 (2) or 19170419 (1) Gaskets
- 11562524 (20) Bolts
- 12558840 (10) Bolts
- 12571164 Spark Plugs
Engine application: L9H
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L92 Cylinder Head Assembly
12629064 Chevrolet Cylinder Head
- Aluminum performance head
- Fits any LS family engine with 4.000″ bore or larger
- 2.165″ hollow stem intake, and 1.590″ solid stem exhaust valves
- .550″ max valve lift
- As-cast L92 style intake ports
- D-shaped exhaust ports
- As-cast combustion chambers
- Uses bare head P/N 12629051
This part replaced by P/N 12629062. Click here for new part.
WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.