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| NEW PRODUCT SPOTLIGHT |
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| NEW RPM XTREME LS SERIES CYLINDER HEADS |
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RPM Xtreme LS Series Head #61949
Our new RPM Xtreme cylinder heads give you the best combination of as-cast port design and custom CNC technology. Through dedicated engineering and rigorous testing, Edelbrock engineers have designed a new line of cylinder heads called RPM Xtreme. These heads blend the affordability of as-cast ports with custom CNC porting in the critical areas (combustion chambers, intake entry, exhaust exit and intake/exhaust bowls) for improved air flow and overall performance. This proven combination provides you with a powerful cylinder head at a lower cost than a typical fully CNC’d head. |
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- Direct replacement for 1997 and later GEN III and GEN IV engines, including 4.8L, 5.3L, 5.7L and 6.0L V8s
- Tested on a Z06 Corvette LS1 engine, these heads made 488 hp @ 6500 rpm and 432 ft./lbs. of torque @ 5000 rpm with just a head and cam change.
- 5/8" thick deck can be machined for additional compression if desired
- 214cc intake ports flow 286 cfm @ .600" lift
- 80cc exhaust ports flow 215 cfm @ .650" lift w/o pipe
- Stainless steel 2.02" intake and 1.57" exhaust valves
- Performance gains comparable to competitors’ fully CNC’d heads, giving you performance at an affordable price!
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| FLOW DATA
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Bore: 3.900-inch
Pressure Differential: 28" H20
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| Measured in CFM
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| Valve |
Lift Intake |
Ex. Flow |
| .200" |
137.2 |
111.1 |
| .300" |
199.4 |
152.6 |
| .400" |
239.4 |
188.3 |
| .450" |
256.9 |
198.6 |
| .500" |
276.0 |
203.6 |
| .550" |
282.7 |
208.7 |
| .600" |
286.0 |
211.9 |
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| Edelbrock RPM Xtreme LS Series Specifications: |
Combustion
Chamber |
Int. Runner
Volume |
Ex. Runner
Volume |
Intake
Valve |
Exhaust
Valve |
Deck
Thickness |
Valve
Springs |
Valve
Train |
65cc.
CNC Ported |
214cc.
CNC Profiled |
78cc.
CNC Profiled |
2.02 inch |
1.57 inch |
5/8 inch |
Beehive
Up to .600" lift |
Stock |
| PERFORMER RPM LS SEMI-CNC HEADS FOR GEN III ENGINES |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 65cc |
214cc |
2.02"/1.57" |
N/A |
#61949* |
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