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  Home > Cylinder Heads > ProMAXX Cylinder Heads > Chrysler _ Small Block >

ProMAXX Cylinder Heads_MOPAR Small Block_MAXX_171cc_2.020/1.600_63cc
ProMAXX Cylinder Heads

Photo may not be actual product


Optional Cylinder Heads:

PMX-9361 Bare
PMX-9360 Hydraulic Flat Tappet
PMX-9362 Hydraulic Roller

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.

  • 171cc 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-9361 MAXX_MOPAR SB_171cc_Bare
PMX-9362 MAXX_MOPAR SB_171cc_H/R_.600 Max Lift
PMX-9360 MAXX_MOPAR SB_171cc_HFT_.575 Max Lift
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Flow Chart:

Flow Data: cfm @ 28 inches of Water
Lift .100 .200 .300 .400 .500 .600
Intake 71
133 191 236 251 254
Exhaust 66 111 145 173 185 193

Technical Specs:
Item Code PMX-9361-000
Vendor ProMAXX Performance Products
Product Type Cylinder Heads
Product Model MAXX Series
Engine Family MOPAR Small Block
Material 356-t6 cast aluminum
Weight 55 lbs
Combustion Chamber 63 cc
Plug Orientation Angle
Intake Runner 171 cc
Exhaust Runner 77 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 111-3602
Valve Spacing OEM
Intake Gaskets Fel-Pro 1213
Exhaust Gaskets Fel-Pro 1432
Head Gaskets Fel-Pro 8553PT
Spark Plug .750 Reach Gasket Seat
Torque Specifications 80 ft lbs in 3 increments using 30wt oil

Valve Spring Pressures:

Hydraulic Flat Tappet - .600 Max Lift:
Closed 115 lbs @ 1.800
Open 310 lbs @ 1.225

Hydraulic Roller - .700 Max Lift:
Closed 145 lbs @ 1.800
Open 325 lbs @ 1.200

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Cylinder Heads > ProMAXX Cylinder Heads > Chrysler _ Small Block