• 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