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ProMAXX Cylinder Heads_Chevrolet Small Block_MAXX_183cc_2.020/1.600_Angle Plug_72cc
ProMAXX Cylinder Heads

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Optional Cylinder Heads:

PMX-91842A Bare
PMX-91832AHFT Hydraulic Flat Tappet
PMX-91832AHR Hydraulic Roller
PMX-91832ASR Solid Roller
PMX-91832ASRT 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.

  • 183cc 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-91842A MAXX_Chevrolet SB_183cc_Angle Plug_Bare
$925.00
PMX-91832AHR MAXX_Chevrolet SB_183cc_Angle Plug_H/R_.600 Max Lift
$1,265.00
PMX-91832A MAXX_Chevrolet SB_183cc_Angle Plug_HFT
$1,165.00
PMX-91832ASRT MAXX_Chevrolet SB_183cc_Angle Plug_S/R_.700 Max Lift_w/Ti Retainers
$1,500.00
PMX-91832ASR MAXX_Chevrolet SB_183cc_Angle Plug_SR_.700 Max Lift
$1,365.00
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Flow Chart:

Flow Data: cfm @ 28 inches of Water
Lift .100 .200 .300 .400 .500 .600
Intake 68
 137 198 241 249 250
Exhaust 58 111 153 180 195 200




Technical Specs:
Item Code PMX-91832-000
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 72 cc
Plug Orientation Angle
Intake Runner 183 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