ProMaxx Performance Products Cylinder Heads Shocker SBC 225 Straight Plug 2.08/1.6/64cc Pro Designed Full CNC Port
9227 (Sold in Pairs)
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.
Shocker SBC 225 Straight Plug 2.08/1.6/64cc Pro Designed Full CNC Port and Chamber 5 Angle Valve Job Fully Assembled with Stainless Valves 7/16 Studs, Guide Plates and .700 Max Lift Solid Roller Springs (Pair)
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 |
Technical Specification:
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 1404
Head Gasket ……….. Fel-Pro 1004 or 1094
Spark Plug …………. .750” Reach Gasket Seat
Torque specs …….. 80 Ft lbs. 3 increments using 30wt oil