Chevrolet Performance LS3 Cylinder Heads 12675871

Overview

Brand:
Chevrolet Performance
Manufacturer’s Part Number:
12675871
Part Type:
Cylinder Heads
Product Line:
Chevrolet Performance LS3 Cylinder Heads
Summit Racing Part Number:
NAL-12675871
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.

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