| Street Legal & Street High-Performance Heads - SMALL-BLOCK CHEVY |
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Performer LT1
- Designed for the 1992-97 LT1 engines
- 24 horsepower more than factory-stock LT1 heads, peak power level raised by 500 rpm
- Work with stock or aftermarket self-aligning roller rocker arms
- E.O. number pending
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| PERFORMER LT1 |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 54cc |
170cc |
1.94"/1.55" |
#61919 |
#61909 |
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RPM Xtreme CNC LT4 Head
- Fully CNC machined combustion chambers
- CNC-blended, as-cast intake ports
- CNC-blended, as-cast exhaust ports.
- 356-T6 heat treated aluminum casting
- ½" OD Manganese-Bronze guides,
- Ductile iron interlocking valve seat inserts
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| RPM Xtreme CNC LT4 Head |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 54cc |
195cc |
2.02"/1.570" |
#61929 |
#61939 |
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AMC
Small Block
