Chevy LS L92 Cylinder Head Assembly

Product Details

THE 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 Chevrolet Performance’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.

L92 Cylinder Head Assembly
• Aluminum performance head
• Fits any LS family engine with 4.000" bore or larger
• 2.165" solid stem intake, and 1.590" solid stem exhaust valves
• .510" max valve lift
• As-cast L92 style intake ports
• D-shaped exhaust ports
• As-cast combustion chambers

Head P/N 12629064 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

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

NOTE: Chevrolet Performance heads will not fit 4.8L and 5.3L engines, due to their smaller bore sizes.

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