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Mast Motorsports Rectangular Port LS7 12 Degree 6-Bolt Large Bore CNC Assembled (4.125″ Bore)

$3,899.79

Model Number: 510-307
Brands:
Mast Motorsports
  • Utilizes the Gen IV LS7 valve-train and intake manifold.
  • Designed for any new Gen IV short-block with 4.125″ bore or larger.
  • Uses a 2.200″ intake valve and 1.600″ exhaust valve
  • Has a 280cc intake port
  • Has a deck thickness of .750″
  • Has a 70cc Combustion Chamber Standard

Each Mast Black Label cylinder head assembly includes:

  • A fully CNC machined Mast Black Label aluminum cylinder head
  • Mast nitrided & micro finished .700″ Lift Dual Springs
  • Mast lightweight stainless steel intake & exhaust valves
  • Mast lightweight steel retainers
  • Mast machined locks

NOTE: Gaskets, valve covers, rocker arms and pushrods not included

Flow Data w/4.125″ Bore Plate

Lift Intake Exhaust

0.100 76 65

0.200 163 118

0.300 245 171

0.400 307 212

0.500 350 229

0.600 379 245

0.650 388 247

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SKU: 510-307 Category: