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LS3 240cc 3.890"+ | Single CNC Cylinder Head
LS3 240cc 3.890"+ | Single CNC Cylinder Head
LS3 240cc 3.890"+ | Single CNC Cylinder Head
LS3 240cc 3.890"+ | Single CNC Cylinder Head
$ 1,425.00

LS3 240cc 3.890"+ | Single CNC Cylinder Head

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Only left in stock

Looking to take your LS1, LS2 or LS6 engine to the next level?  The Mast LS3 240 head is a great choice.  This head was designed to allow owners of Gen III ls engines to benefit from the much-improved stock LS3 intakes.  This head really thrives when paired with a stroker combination like a LS1 383!


  • Easy bolt on to convert your GM Gen III to GM Gen IV head technology
  • Perfect for LS1, LS2 and LS6 engines and short-blocks
  • Accepts LS3/L92 valve springs, rocker arms, and intake manifolds
  • Outflows any aftermarket cathedral cylinder head on the market
  • Uses a 2.080" intake valve and 1.570" exhaust valve
  • 11 Degree Valve angle
  • Has a 61cc combustion chamber standard
  • 6 Bolt Standard
  • Has a deck thickness of .750"
  • Cast & Machined in the USA!