Chevrolet GM LS3 Cylinder Head With Valves & Springs # 12675871

Chevrolet GM LS3 Cylinder Head With Valves & Springs # 12675871Cylinder Head, LS3, Aluminum, Assembled, 68. 4cc, 260cc Intake Runner, Each Combustion Chamber Volume (cc): 68. 4 Intake Runner Volume (cc): 260cc Cylinder Head Style: Assembled Cylinder Head Material: Aluminum Intake Port Shape: Rectangular Intake Valve Diameter (in.): 2. 165 in. CNC Machined Combustion Chamber: No CNC Machined Intake Runner: No CNC Machined Exhaust Runner: No Intake Port Location: Standard Exhaust Port Shape: D port Exhaust Port

Cylinder Head, LS3, Aluminum, Assembled, 68.4cc, 260cc Intake Runner, Each

Combustion Chamber Volume (cc):

68.4

Intake Runner Volume (cc):

260cc

Cylinder Head Style:

Assembled

Cylinder Head Material:

Aluminum

Intake Port Shape:

Rectangular

Intake Valve Diameter (in.):

2.165 in.

CNC-Machined Combustion Chamber:

No

CNC-Machined Intake Runner:

No

CNC-Machined Exhaust Runner:

No

Intake Port Location:

Standard

Exhaust Port Shape:

D-port

Exhaust Port Location:

Standard

Spark Plug Style:

Angle

Intake Valves Included:

Yes

Exhaust Valves Included:

Yes

Exhaust Valve Diameter (in.):

1.590 in.

Valve Springs Included:

Yes

Maximum Valve Lift (in.):

0.570 in.

Camshaft Style:

Hydraulic roller

Outside Diameter of Outer Spring (in.):

1.290 in.

Damper Spring Included:

No

Number of Springs Per Valve:

Single

Retainers Included:

Yes

Retainer Material:

Steel

Locks Included:

Yes

Valve Stem Seals Included:

Yes

Valve Stem Seal Style:

Positive stop

Rocker Arm Studs Included:

No

Rocker Arms Included:

No

Rocker Arm Nuts Included:

No

Guideplates Included:

No

Valve Cover Mounting Style:

Centerbolt

Accessory Bolt Holes Drilled:

Yes

Intake Valve Angle:

15

Exhaust Valve Angle:

15

Valve Guides Included:

Yes

Valve Guide Material:

Powdered metal

Valve Seats Machined:

Yes

Valve Seat Material:

Steel

Cylinder Head Color:

Natural

Steam Holes Drilled:

No

Oiling Style:

Through pushrod

Machined for O-Ring:

No

Heat Crossover:

No

Quantity:

Sold individually.

Notes:

These cylinder heads can only be used on 4 bolt LS-based engines with a 4.000 in. bore or larger.

Chevrolet Performance LS3 Cylinder Heads

Fit any LS engine with Chevrolet Performance LS3 cylinder heads. Manufactured from aluminum alloy, these GM stock replacement heads are assembled with intake and exhaust valves, stem seals, retainers, springs, and locks. Great cylinder head airflow has always supplied the LS Series with exceptional performance. Retain that performance and save yourself time and worry by replacing your tired cylinder heads with Chevrolet Performance LS3 cylinder heads.