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  Home > Cylinder Heads > ProMAXX Cylinder Heads > Chevrolet _ Big Block >

ProMAXX C/H_MAXX_Chevrolet Big Block_Rectangular Port 317cc_2.250/1.880_119cc_Hydraulic Roller_.600 Lift_Steel Retainers
ProMAXX Cylinder Heads

Photo may not be actual product

  

Ships from Supplier
Price $2,144.00


Product Code: PMX-2211

Description Technical Specs
 


The Maxx 317 is truly a rare breed in today’s market. An as-cast head that is just as efficient as our competition’s CNC ported pieces. Independent flow bench testing shows over 400 cfm with 2.300 valves. This head will change the industry as, compared to any other brand, this head makes power!

  • 317cc Intake runner
  • 24 degree Intake valve angle
  • 15 degree Exhaust valve angle
  • CNC inspired casting
  • Ultra-smooth casting
  • 356-T6 aluminum
  • Multiple valve sizes available
  • Over 400 cfm
  • .750 deck thickness
  • Diamond honed guides
  • Multiple spring options
  • 5 angle valve job
  • Professional Assembly
  • Machined and Assembled in USA
  • Assemblies include: 21-4N 1pc swirl polished back cut valves, 7/16 studs and guide plates


Assembled heads feature:
  • One piece stainless steel valves
  • 21-4N back cut, swirl polished
  • 7/16 Studs and Guide Plates
  • Multiple spring options
  • Designed, machined and assembled in the USA
Flow Chart

Flow Data: cfm @ 28 inches of Water
Lift .200 .300 .400 .500 .600 .700 .800
 .900 1.00
Intake 168
 249 311 356 377 389 395 400 n/a
Exhaust 135 182 221 261 283 297 303 305 n/a


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