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01543 431941

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LS3 Cylinder Head Assembly

SKU: 12629063

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Cylinder Head Assembly For LS3 Engines

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Availability: In stock

Excl. Tax: £499.95 Incl. Tax: £599.94
LS3 Cylinder Head Assembly is available for purchase in increments of 1

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The LS Family Production and C5R Aluminium Heads Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional Performance. GM Performance Parts delivers those power-building attributes to you with a range of production-style aluminium heads – from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminium heads benefit from General Motors’ 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.

Aluminium LS Family Head Technical Notes:
• Manufactured from 319-T5 aluminium 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 C5R)
• Centre-bolt valve cover hold-downs
• Fits Gen III and Gen IV Small-Blocks only*

LS3 Cylinder Head Assembly
• Aluminium 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
• .570"" max valve lift
• As-cast L92 style intake ports
• D-shaped exhaust ports
• As-cast combustion chambers
• Uses bare head P/N 12629051

Tech Specs No
Fits No
Fiat No
Alfa Romeo No
Phone Model No
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