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ProMAXX Cylinder Heads_Chevrolet Big Block_MAXX_317cc_2.250/1.880_119 cc
ProMAXX Cylinder Heads

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Optional Cylinder Heads:

PMX-2210 Bare
PMX-2211 Hydraulic Roller
PMX-2214 Solid Roller
PMX-2216 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.

  • 317cc 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-2210 MAXX _Chevrolet BB_317cc_Bare
$1,565.00
PMX-2211 MAXX_Chevrolet BB_317cc_H/R_.600 Max Lift
$2,145.00
PMX-2214 MAXX_Chevrolet BB_317cc_S/R_.700 Max Lift
$2,375.00
PMX-2216 MAXX_Chevrolet BB_317cc_S/R_.850 Max Lift_w/Ti Retainers
$2,880.00
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Flow Chart:

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




Technical Specs:
Item Code PMX-2210-000
Vendor ProMAXX Performance Products
Product Type Cylinder Heads
Product Model MAXX Series
Engine Family Chevrolet Small Block
Material 356-t6 cast aluminum
Weight 79 lbs
Combustion Chamber 119 cc
Plug Orientation Angle
Intake Runner 317 cc
Exhaust Runner 135 cc
Exhaust Port Raised .375
Intake Valve Diameter 2.250
Exhaust Valve Diameter 1.880
Valve Seats Hardened Steel
Valve Angles 24.2° Intake 15.4° Exhaust
Valve Guides Manganese Bronze
Valve Seals Viton
Standard Retainers Steel
Valve Job Type 5 Angle
Head Bolts ARP 135-3603 (Mark IV) 135-3607 (Mark V)
Head Studs ARP 235-4703 (Mark IV) 235-4713 (Mark V)
135-3607 Valve Spacing OEM
Intake Gaskets Fel-Pro 1275
Exhaust Gaskets Fel-Pro 1412
Head Gaskets Fel-Pro 1047 (Mark V/VI) or 1017 (Mark IV)
Spark Plug .750 Reach Gasket Seat
Torque Specifications 80 Ft lbs in 3 increments using 30wt oil




Valve Spring Pressures:

Hydraulic Roller - .600 Max Lift:
Closed 135 lbs @ 1.800
Open 365 lbs @ 1.350

Solid Roller - .700 Max Lift:
Closed 220 lbs @ 2.000
Open 600 lbs @ 1.300

Solid Roller - .800 Max Lift:
Closed 325 lbs @ 2.100
Open 8400 lbs @ 1.200




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Cylinder Heads > ProMAXX Cylinder Heads > Chevrolet _ Small Block