Shocker 225 SBC CNC
(Sold in Pairs)

$1,190.00$1,655.00

The Shocker 225 CNC is the ultimate 23 degree small block Chevy head. It requires no special components. Fully CNC’d runners and chambers designed and ported in the USA. Porting is equivalent to other companies more expensive port work. Flowing over 325 CFM these heads will support big cubic inch and big horse power easily over 725 horsepower. The absolute best CNC value PERIOD.

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Features:

  • Pro designed CNC ports/ chambers
  • 225cc Fully CNC ported in the USA Runners and Chambers
  • Ultra-smooth 356-T6 Aluminum Casting
  • 5 angle valve job
  • Angle or straight plug
  • Diamond honed guides
  • Large spring pockets
  • Multiple spring options
  • Assemblies include: 21-4N stainless 1pc swirl polished back cut valves studs and guide plates
  • Machined and Assembled in the USA
Flow Data @ 28″ water
lift 200 300 400 500 600 700 800
Int 150 214 270 296 316 319 326
Ext 114 147 176 205 225 238 238

 

PART # BRIEF DESCRIPTION PLUG TYPE CHAMBER SIZE VALVE SIZE MAX LIFT
9225 225 SBC CNC Assy Straight 64 2.08/1.6 .600 Hyd Roller
9226 225 SBC CNC Bare Straight 64 2.08/1.6
9227 225 SBC CNC Assy Straight 64 2.08/1.6 .700 Solid Roller
9228 225 SBC CNC Assy Straight 64 2.08/1.6 .700 Solid Roller Ti Retainers
92252 225 SBC CNC Assy Straight 72 2.08/1.6 .600 Hyd Roller
92262 225 SBC CNC Bare Straight 72 2.08/1.6
92272 225 SBC CNC Assy Straight 72 2.08/1.6 .700 Solid Roller
92282 225 SBC CNC Assy Straight 72 2.08/1.6 .700 Solid Roller Ti Retainers
9225A 225 SBC CNC Assy Angle 64 2.08/1.6 .600 Hyd Roller
9226A 225 SBC CNC Bare Angle 64 2.08/1.6
9227A 225 SBC CNC Assy Angle 64 2.08/1.6 .700 Solid Roller
9228A 225 SBC CNC Assy Angle 64 2.08/1.6 .700 Solid Roller Ti Retainers
92252A 225 SBC CNC Assy Angle 72 2.08/1.6 .600 Hyd Roller
92262A 225 SBC CNC Bare Angle 72 2.08/1.6
92272A 225 SBC CNC Assy Angle 72 2.08/1.6 .700 Solid Roller
92282A 225 SBC CNC Assy Angle 72 2.08/1.6 .700 Solid Roller Ti Retainers

Combustion Chamber ……64-72cc
Weight …………………………55.00 lbs.
Intake Runner ……………. 225cc
Exhaust Runner …………..72cc
Intake Valve Size …………2.02”-2.08″
Exhaust Valve Size …….. 1.60””
Spring Pressure

Hydraulic Flat Tappet .575 max lift
Closed ………………….. 115 lbs. @ 1.800”
Open ……………………. 310 lbs. @ 1.225”

Hydraulic Roller .600 max lift
Closed …………………… 145 lbs. @ 1.800”
Open …………………….. 325 lbs. @ 1.200”

Solid Roller .700 max lift
Closed …………………… 230 lbs. @ 1.900”
Open …………………….. 600 lbs. @ 1.200”

******* other options available******

Valve Guide ……………Manganese Bronze
Valve Seal Material … Viton
Retainer Material ……Steel
Valve Job ……………… 5-angle
Head Bolts……………. ARP 134-3601
Valve Spacing ………. OEM
Valve Seats ……………Hardened Steel
Intake Gasket ………. Fel-Pro 1206
Exhaust Gasket ……. Fel-Pro 1415
Head Gasket ……….. Fel-Pro 1004 or 1094
Spark Plug …………. .750” Reach Gasket Seat
Torque specs ……..   80 Ft lbs. 3 increments using 30wt oil

 

Additional information

Weight N/A