348/409 “W” SERIES CHEVY STREET HIGH-PERFORMANCE
- Designed for 1961-1965 Chevrolet “W” series 348/409 big-block engines
- Original port locations and valve angles for bolt-on convenience
- CNC port matched 220cc intake and 90cc exhaust ports for optimum flow and power
- Improved port design for more performance
- Hardened spring cups, screw-in rocker studs and hardened guideplates
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| PERFORMER RPM 348/409 Chevy |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| N/A |
220cc |
2.19"/1.72" |
#60809* |
#60819* |
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| Notes: May be used on 348 engines with valve lifts up to .550" only. |
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