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ProMAXX C/H_MAXX_Chevrolet Big Block_Oval Port 290cc_2.250/1.880_110cc_Bare Head
ProMAXX Cylinder Heads

Photo may not be actual product

  

Ships from Supplier
Price $1,565.00


Product Code: PMX-9290

Description Technical Specs
 


The Maxx 290 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!

  • 290cc 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 375 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 159
 233 290 327 357 372 375 376 n/a
Exhaust 135 182 221 261 283 297 303 305 n/a


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