| Street Legal & Street High-Performance Heads |
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Performer RPM S/B Chevy
- Designed for 302, 327, 350 and 400 c.i.d. engines up to 1986
- Heads with 64cc combustion chambers improve performance and retain stock
compression ratio on 1970 and earlier small-blocks
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| PERFORMER RPM WITH ANGLED PLUGS |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 70cc |
170cc |
2.02"/1.60" |
#60619* |
#60719* |
| 64cc |
170cc |
2.02"/1.60" |
#60949* |
#60999* |
| PERFORMER RPM WITH STRAIGHT PLUGS |
| 70cc |
170cc |
2.02"/1.60" |
#60639* |
#60739* |
| 64cc |
170cc |
2.02"/1.60" |
#60889* |
#60899* |
| POLISHED PERFORMER RPM WITH ANGLED PLUGS |
| 70cc |
170cc |
2.02"/1.60" |
N/A |
#607119* |
| POLISHED PERFORMER RPM WITH STRAIGHT PLUGS |
| 70cc |
170cc |
2.02"/1.60" |
N/A |
#607319* |
| 64cc |
170cc |
2.02"/1.60" |
N/A |
#608919* |
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To use stock rockers on Performer & Performer RPM Chevy heads, .100" longer than stock pushrods are required. |
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Use Head Bolt Kits for easy installation. |
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S/B Chevy heads may not be used on engines with less than 4" bore (262, 265, 283, 305, 307 c.i.d.) except with cams having less than .450" valve lift. |
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Edelbrock E-Tec
- For 302, 327, 350 and 400 c.i.d. small-block Chevys with "Vortec-style" intake manifolds
- High-quench chamber promotes uniform atomization of the a/f mixture for more power
- Intake ports are .200" taller than standard small-block Chevy heads
- Spark plugs positioned closer to the center of the cylinder for more efficient combustion
- Accept center-bolt or standard valve covers and most stock exhaust manifolds
- Exhaust port exits are .200" higher than standard heads
- Match with an Edelbrock Vortec manifold
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E-Tec 170
- 20% more exhaust flow than cast iron Vortec heads, good power up to 6000 rpm
- 64cc chambers produce 9.5:1 compression with stock pistons in 350-inch engines
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| STREET LEGAL E-TEC 170 |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 64cc |
170cc |
1.94"/1.55" |
#60959 |
#60979 |
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E-Tec 200
- Outflow other similar aluminum heads by 10% on the intake and 17% on the exhaust,
- making power up to 6500 rpm
- 64cc chambers produce 10.2:1 compression with flat-top pistons in 350-inch engines
- E.O. number pending
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| E-TEC 200 |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 64cc |
200cc |
2.02"/1.60" |
#60969* |
#60989* |
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AMC
Small Block
