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CNC Sportsman Porting
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Home : Cylinder Heads : Undercover & CNC Porting : CNC Sportsman Porting
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CNC Sportsman Porting
The eltimate in ported heads.
Gain 20 to 50 horsepower with our CNC Sportsman Porting! |
CNC Sportsman Porting Package includes:
- CNC combustion chambers
- CNC machined intake and exhaust bowls
- Intake bowls and short side radius reworked
- Exhaust bowls and short side radius reworked
- Intake port openings matched to proper gasket size
- Valve guides are honed to proper clearance
- Valve job performed on Serdi machine
- Heads are pressure tested
- Flow sheet supplied with each set
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Chevrolet Factory Heads |
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| Part# |
Description |
Price |
| BT-SMAN |
Bow-Tie castings, bare with CNC Sportsman Porting. |
2,395.00 |
| 492-SMAN |
492 castings, bare with CNC Sportsman Porting. |
2,595.00 |
| VTBT-SMAN |
Vortec Bow-Tie castings, bare with CNC Sportsman Porting. |
1,695.00 |
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Dart Iron Eagle Heads |
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| IE-SMAN |
Iron Eagle, Platinum castings, 200, 215 or 230 cc runner size, bare with CNC Sportsman Porting . |
1,795.00 |
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World Products Heads |
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| SM-SMAN |
Sportsman II castings, bare with CNC Sportsman Porting. |
1,950.00 |
| MT-SMAN |
220 cc Motown castings, bare with CNC Sportsman Porting. |
1,695.00 |
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Ford Heads |
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| 351W-SMAN |
351 Windsor factory castings with CNC Sportsman Porting |
1,895.00 |
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Compare Stock Ports to Sportsman Ported
Compare Stock Ports to Sportsman Ported
Iron Eagle - 200cc Platinum
Stock vs. CNC Sportsman Ported |
| Lift |
Stock
Intake |
Ported
Intake |
Stock
Exhaust |
Ported
Exhaust |
| .100 |
63 |
68 |
61 |
61 |
| .200 |
129 |
140 |
106 |
108 |
| .300 |
182 |
193 |
137 |
142 |
| .400 |
225 |
237 |
161 |
172 |
| .500 |
256 |
270 |
172 |
185 |
| .600 |
270 |
285 |
177 |
196 |
| .700 |
272 |
292 |
184 |
199 |
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’492 Straight Plug
Stock vs. CNC Sportsman Ported |
| Lift |
Stock
Intake |
Ported
Intake |
Stock
Exhaust |
Ported
Exhaust |
| .100 |
069 |
062 |
057 |
056 |
| .200 |
130 |
129 |
107 |
109 |
| .300 |
173 |
180 |
125 |
141 |
| .400 |
198 |
217 |
137 |
166 |
| .500 |
206 |
238 |
141 |
174 |
| .600 |
209 |
244 |
141 |
181 |
| .700 |
209 |
246 |
141 |
185 |
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World Products Sportsman II
Stock vs. CNC Sportsman Ported |
| Lift |
Stock
Intake |
Ported
Intake |
Stock
Exhaust |
Ported
Exhaust |
| .100 |
64 |
68 |
60 |
58 |
| .200 |
130 |
139 |
107 |
118 |
| .300 |
186 |
196 |
123 |
158 |
| .400 |
212 |
235 |
136 |
178 |
| .500 |
230 |
256 |
142 |
186 |
| .600 |
231 |
272 |
143 |
190 |
| .700 |
235 |
278 |
143 |
192 |
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Bow-Tie
Stock vs. CNC Sportsman Ported |
| Lift |
Stock
Intake |
Ported
Intake |
Stock
Exhaust |
Ported
Exhaust |
| .100 |
63 |
63 |
58 |
61 |
| .200 |
126 |
140 |
113 |
124 |
| .300 |
180 |
194 |
135 |
158 |
| .400 |
209 |
235 |
143 |
168 |
| .500 |
212 |
258 |
145 |
174 |
| .600 |
211 |
260 |
147 |
182 |
| .700 |
209 |
263 |
149 |
186 |
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Since 1981, The #1 Name in Cast Iron Heads
Call us toll free at 866-236-6300 |
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