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You are here: Home > Cylinder Heads > ProMAXX Cylinder Heads > Shocker CNC Series


ProMAXX Shocker CNC Series is the top of the line performance cylinder head. It features professionally designed runners and chambers that are meticulously CNC ported. The all new ProMAXX ultra smooth Grade A 356-T6 aluminum casting is CNC machined to create the perfect platform for newly developed runner and chamber designs. This is combined with a 5 angle competition valve job, diamond honed bronze guides, large spring pockets and professional assembly, performed right here in the United States. Pro MAXX Shocker CNC Heads are proof that going fast doesnít have to break the bank.
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ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Big Block_Shocker CNC Series_240cc_MOPAR Big Block_2.190/1.810_84 cc

P/N: PMX-BBM-84A-9240
  • 356-t6 Aluminum
  • 240cc Intake Runner
  • Hand bowl blended
  • 84cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Big Block_Shocker CNC Series_340cc_2.300/1.880_121cc

P/N: PMX-BBC-121A-9341
  • 356-t6 Aluminum
  • 340cc Intake Runner
  • Hand bowl blended
  • 121cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Big Block_Shocker CNC Series_370cc_2.300/1.880_121 cc

P/N: PMX-BBC-121A-9371
  • 356-t6 Aluminum
  • 370cc Intake Runner
  • Hand bowl blended
  • 121cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Small Block_Shocker CNC Series_225cc_2.080/1.600_64 cc

P/N: PMX-SBC-64A-9227
  • 356-t6 Aluminum
  • 225cc Intake Runner
  • CNC Precision Machined
  • Angle Plug
  • 64cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Small Block_Shocker CNC Series_225cc_2.080/1.600_64cc

P/N: PMX-SBC-64S-9226
  • 356-t6 Aluminum
  • 225cc Intake Runner
  • CNC Precision Machined
  • Straight Plug
  • 64cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Small Block_Shocker CNC Series_225cc_2.080/1.600_72cc

P/N: PMX-SBC-72S-9226
  • 356-t6 Aluminum
  • 225cc Intake Runner
  • CNC Precision Machined
  • Straight Plug
  • 72cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Chevrolet Small Block_Shocker CNC Series_225cc_2.080/1.600_72cc

P/N: PMX-SBC-72A-9227
  • 356-t6 Aluminum
  • 225cc Intake Runner
  • CNC Precision Machined
  • Angle Plug
  • 72cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Ford FE Series_Shocker CNC Series_200cc_2.090/1.660_72 cc

P/N: PMX-FFE-72S-9230
  • 356-t6 Aluminum
  • 200cc Intake Runner
  • Hand bowl blended
  • 72cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Ford FE Series_Shocker CNC Series_200cc_2.090/1.660_76 cc

P/N: PMX-FFE-72S-9231
  • 356-t6 Aluminum
  • 200cc Intake Runner
  • Hand bowl blended
  • 76cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info
ProMAXX Cylinder Heads
ProMAXX Cylinder Heads_Ford FE Series_Shocker CNC Series_200cc_2.200/1.730_76 cc

P/N: PMX-FFE-72S-9234
  • 356-t6 Aluminum
  • 200cc Intake Runner
  • Hand bowl blended
  • 76cc Combustion Chamber
Assembled heads feature 21-4N, back cut swirl polished, 1 pc stainless steel valves.
more info