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ProMAXX Cylinder Heads_Chevrolet Small Block_MAXX_200cc_2.020/1.600_Angle Plug_64cc
ProMAXX Cylinder Heads

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Optional Cylinder Heads:

PMX-9201A Bare
PMX-9200A Hydraulic Flat Tappet
PMX-9200AHR Hydraulic Roller
PMX-9200ASR Solid Roller
PMX-9200ASRT Solid Roller w/Ti Retainers


The Pro MAXX MAXX Series is taking the lead in affordable performance cylinder heads to the next level, since there are no comparable cylinder heads available. 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, hand bowl blending and professional assembly....all performed right here in the United States. ProMAXX MAXX Series cylinder heads produce out of box performance that outperforms anything in it's class.

  • 200cc Intake runner
  • Ultra smooth 356-t6 Aluminum
  • Hand bowl blended
  • Unshrouded chamber
  • Diamond honed guides
  • Large spring pockets
  • 5 angle valve job
  • Precision CNC machining
  • Multiple spring options


Assembled heads feature:
  • One piece stainless steel valves
  • 21-4N back cut, swirl polished
  • Multiple spring options
  • Designed, machined and assembled in the USA


Item# Item Name Price Qty Add
PMX-9201A MAXX_Chevrolet SB_200cc_Angle Plug_Bare
$950.00
PMX-9200AHR MAXX_Chevrolet SB_200cc_Angle Plug_H/R_.600 Max Lift
$1,295.00
PMX-9200A MAXX_Chevrolet SB_200cc_Angle Plug_HFT_.575 Max Lift
$1,195.00
PMX-9200ASR MAXX_Chevrolet SB_200cc_Angle Plug_S/R_.700 Max Lift
$1,425.00
PMX-9200ASRT MAXX_Chevrolet SB_200cc_Angle Plug_S/R_.700 Max Lift_w/Ti Retainers
$1,525.00
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Flow Chart:

Flow Data: cfm @ 28 inches of Water
Lift .100 .200 .300 .400 .500 .600 .700
Intake 71 146 206 242 265 277 281
Exhaust 54 111 155 179 193 199 201




Technical Specs:
Item Code PMX-9200A-000
Vendor ProMAXX Performance Products
Product Type Cylinder Heads
Product Model MAXX Series
Engine Family Chevrolet Small Block
Material 356-t6 cast aluminum
Weight 55 lbs
Combustion Chamber 64 cc
Plug Orientation Angle
Intake Runner 200 cc
Exhaust Runner 72 cc
Intake Valve Diameter 2.020
Exhaust Valve Diameter 1.600
Valve Seats Hardened Steel
Valve Guides Manganese Bronze
Valve Seals Viton
Standard Retainers Steel
Valve Job Type 5 Angle
Head Bolts ARP 134-3601
Valve Spacing OEM
Intake Gaskets Fel-Pro 1206
Exhaust Gaskets Fel-Pro 1404
Head Gaskets Fel-Pro 1004 or 1094
Spark Plug .750 Reach Gasket Seat
Torque Specifications 80 Ft lbs in 3 increments using 30wt oil




Valve Spring Pressures:

Hydraulic Flat Tappet - .575 Max Lift:
Closed 115 lbs @ 1.800
Open 310 lbs @ 1.225

Hydraulic Roller - .600 Max Lift:
Closed 145 lbs @ 1.800
Open 325 lbs @ 1.200

Solid Roller - .700 Max Lift:
Closed 230 lbs @ 1.900
Open 600 lbs @ 1.200




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Cylinder Heads > ProMAXX Cylinder Heads > Chevrolet _ Small Block