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ProMAXX Cylinder Heads_Ford Windsor_Shocker CNC Series_210cc_2.080/1.600_64cc
ProMAXX Cylinder Heads

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Optional Cylinder Heads

PMX-SBF-64S-9212B Bare
PMX-SBF-64S-9212HR Hydraulic Roller
PMX-SBF-64S-9212SR Solid Roller
PMX-SBF-64S-9212SRT Solid Roller w/Ti Retainers

ProMAXX Shocker CNC Series is the top of the line performance cylinder head. It features professionally designed runners and chambers that are meticulously CNC ported. 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, large spring pockets and professional assembly, performed right here in the United States. Pro MAXX Shocker CNC Heads are proof that going fast doesnít have to break the bank.

  • 210cc Intake runner
  • Ultra smooth 356-t6 Aluminum
  • Precision CNC Machining
  • 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-SBF-64S-9212B Shocker CNC Series_Ford Windsor_210cc_Bare
PMX-SBF-64S-9212HR Shocker CNC Series_Ford Windsor_210cc_Hydraulic Roller
PMX-SBF-64S-9212SR Shocker CNC Series_Ford Windsor_210cc_Solid Roller
PMX-SBF-64S-9212SRT Shocker CNC Series_Ford Windsor_210cc_Solid Roller_w/Ti Retainers
Check the items you wish to purchase, then click

Flow Chart:

Flow Data: cfm @ 28 inches of Water
Lift .100 .200 .300 .400 .500 .550 .600 .700 .800
Intake 90 191 230 277 309 318 331 346 351
Exhaust 66 142 163 196 227 240 254 267 249

Technical Specs:
Item Code PMX-SBF-64S-9212
Vendor ProMAXX Performance Products
Product Type Cylinder Heads
Product Model Shocker CNC Series
Engine Family Ford Windsor
Material 356-t6 cast aluminum
Weight 50 lbs
Combustion Chamber 64 cc
Plug Orientation Straight
Intake Runner 210 cc
Exhaust Runner 70 cc
Intake Valve Diameter 2.080
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 154-3701 (302) 154-2603 (351W)
Valve Spacing OEM
Intake Gasket Fel-Pro 1262
Exhaust Gasket Fel-Pro 1415
Head Gasket Fel-Pro 1011-1 ('68-'72) 1011-2 ('83-'95)
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 145 lbs @ 1.800
Open 325 lbs @ 1.200

Solid Roller - .700 Max Lift
Closed 235 lbs @ 1.900
Open 600 lbs @ 1.200

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Cylinder Heads > ProMAXX Cylinder Heads > Shocker CNC Series