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Street Legal & Street High-Performance Heads |
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Edelbrock/Lingenfelter LS1 CNC
- CNC-ported by Lingenfelter Performance Engineering, benefiting from years
of experience in GEN III performance modifications
- Designed for 1997 and later GM LS1 and other GEN III/IV engines,
including 4.8L, 5.3L and 6.0L V8s.
- 65cc combustion chamber retains the stock compression ratio for bolt-on convenience
- Available bare or fully assembled and ready to bolt-on with high-quality stainless steel
2.02" intake and 1.57" exhaust valves.
- Executive Order number D-215-69 for part #61969
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| Combustion Chamber |
65cc, CNC ported |
| Intake Runner Volume |
202cc, CNC ported |
| Exhaust Runner Volume |
83cc, CNC ported |
| Intake Valve |
2.02-inch |
| Exhaust Valve |
1.57-inch |
| Deck Thickness |
5/8-inch |
| Valve Spring |
1.055-inch / 1.290-inch O.D
Up to .600" lift |
| Valve train |
Stock shaft rocker system |
Additional Detailed Specifications (35k) |
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| EDELBROCK/LINGENFELTER LS1 CNC HEADS FOR GEN III/IV ENGINES |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 65cc |
202cc |
2.02"/1.57" |
#61979 |
#61969 |
| Chevrolet Gen III ROCKER STUD BOLT KIT |
#8597 |
| Valley Cover, GM, LS-1/LS-6 |
#7788 |
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RPM Xtreme LS Series Head
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.
- 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— no re-programming!
- 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!
- Executive Order number D-215-69 for part #61949
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| PERFORMER RPM LS SEMI-CNC HEADS FOR GEN III/IV ENGINES |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 65cc |
214cc |
2.02"/1.57" |
N/A |
#61949* |
| Chevrolet Gen III ROCKER STUD BOLT KIT |
#8597 |
| Valley Cover, GM, LS-1/LS-6 |
#7788 |
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| LS-Series Pro-Port Raw Head
Designed, engineered and cast with porting in mind, the Edelbrock LS-Series Pro-Port Raw Head is the perfect casting for any custom cylinder head porter.
Cylinder head porters and engine builders alike now have an affordable LS1 casting that will enable them to create new port configurations, never before possible with the thin, lightweight factory castings. The LS-Series Pro-Port Raw Head casting is the same high-quality casting that Edelbrock has designed for use in our Edelbrock/Lingenfelter CNC ported LS1 cylinder head.
The LS-Series Pro-Port Raw Head has been beefed-up with extra material in all critical areas for unmatched durability in purpose built applications. The Edelbrock #61989 Pro-Port™ casting opens the door to creating small-to-large port configurations ensuring 100% clean-up in the porting process, producing high flowing, and high velocity air-flow numbers. Every LS1 cylinder head specialist will find this high-quality, robust casting the casting of choice when it comes to carving out their own custom ports. Requires professional cylinder head preparation.
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- Machined to OE dimensions to allow for an easy transition with existing CNC programs
- Tall intake short turn and small intake cross-section for modern, high velocity port designs
- Exhaust features extra bowl and short turn material to accommodate all exhaust port shapes philosophies
- Extra metal and merged rocker boss pairs for improved valve train stability and support
- Extra material in the spring pockets to allow machining for larger spring diameters
- Heavy deck thickness ensures optimum gasket retention and material for milling of the deck for smaller combustion chamber sizes
- Newly designed internal water jacket allows for highly efficient cooling without sacrificing extra material and overall strength
- Versatile combustion chamber can be machined from sizes ranging 40cc to 80cc without fear of thin material
- OE quality powdered metal valve seats and Edelbrock proprietary valve guides installed, #61989 Only
- #61999 includes valve guides only. Valve seats are not included to allow for larger valve combinations
- Heli-coiled rocker stands and exhaust flange bolts holes
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| LS-SERIES PRO-PORT RAW HEADS FOR GEN III/IV ENGINES |
| Chamber Size |
Intake Port Size |
Valve Sizes (in/ex) |
Bare (single) |
Complete (single) |
| 40-80cc |
NA |
NA |
#61989* |
-- |
| 40-80cc |
NA |
NA |
#61999** |
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| Chevrolet Gen III ROCKER STUD BOLT KIT |
#8597 |
| Valley Cover, GM, LS-1/LS-6 |
#7788 |
 Note: *Includes valve seats and guides installed. **Valve guides included and installed; valve seats are not included to allow for larger valve combinations.
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AMC
Small Block
