The Edelbrock #61349 Victor Jr. LS3 cylinder heads are ideal for use in high performance street and competition engines that have reached their limit with a stock-style cylinder head design. Most aftermarket LS3 cylinder heads on the market today are simply stock head designs with larger ports. Our Victor Jr. LS3 cylinder heads are an all-new ground up design that incorporates subtle changes for improved flow and combustion. These changes were made to improve the limitations encountered in the stock cylinder heads when increasing the performance level of the engine. Changes include a 2.20" diameter intake valve with a canted configuration similar to what is utilized in the GM LT1 Gen V engine. The intake valve change along with the unique port shape produce almost 400cfm peak flow. These cylinder heads also feature fully CNC intake ports, combustion chambers and exhaust ports for consistency and improved performance. All of these changes make these cylinder heads capable of producing 600+ hp on an LS3 engine with stock rocker arms, intake manifold and exhaust manifolds.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- Yes
- Combustion Chamber Volume (cc):
- 69cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- Yes
- Intake Runner Volume (cc):
- 280cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 11 degree
- CNC-Machined Exhaust Runner:
- Yes
- Exhaust Runner Volume (cc):
- 85cc
- Exhaust Port Shape:
- Round
- Exhaust Port Location:
- Raised
- Exhaust Valve Angle:
- 11 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.200 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.600 in.
- Valve Type:
- N/A
- Maximum Valve Lift (in.):
- 0.680 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Single
- Outside Diameter of Outer Spring (in.):
- 1.300 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Ductile iron
- Valve Seat Machine Style:
- 3-angle
- Retainers Included:
- Yes
- Retainer Material:
- Steel
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- Positive stop
- Locks Included:
- Yes
- Lock Style:
- 7 degree
- Camshaft Style:
- Hydraulic roller
- Spark Plug Style:
- Angled
- Guideplates Included:
- No
- Guideplate Pushrod Size:
- N/A
- Rocker Arm Studs Included:
- No
- Rocker Arm Nut Thread Size:
- N/A
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Centerbolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Notes:
- New design, Canted valve similar to LT1 Gen V heads, Utilizes stock rocker arms. LSX block with 6-bolt flange. Deck thickness 0.625 in.
- CARB EO Number(s):
- D-215-98
- Emissions:
- California EO Approved
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen III/IV (LS-bas
- Engine Sizes:
- 6.2L/376
