Dart Machinery GM LS3 15 Degree Square Port Aluminum Cylinder Heads
Redefining LS performance. Features required for competition use.
- High flowing 280cc intake ports
- Machined with 2.165" x 1.600" valve job
- Copper infiltrated valve seats
- 8mm manganese valve guides
- 6 bolt per cylinder capability
- Uses OE and aftermarket valvetrain
- Accepts OE and aftermarket intake manifolds
- Compatible with all LS3 components
- Peak flow: 370cfm intake and 252cfm exhaust
Part Type: Cylinder Head
Application: Chevrolet/GM LS3
Cylinder Head Material: Aluminum
Bare or Assembled: Assembled
Combustion Chamber Size: 68cc
CNC Machined Combustion Chambers: No
Intake Valve Angle: 12
Exhaust Valve Angle: 12
Intake Port Volume: 280cc
CNC Machined Intake Port: No
Intake Port Flow: 370 cfm @ .800" Lift / 28"
Intake Port Location: Standard
Intake Port Shape: Rectangle
Intake Port Dimensions: 2.600" x 1.260"
Suggested Intake Gaskets: OE
Exhaust Port Volume: 102cc
CNC Machined Exhaust Port: No
Exhaust Port Flow: 252 cfm @ .800" Lift/ 28"
Exhaust Port Location: Standard
Exhaust Port Shape: Oval
Exhaust Port Dimensions: 1.750" x 1.550"
Suggested Exhaust Gaskets: OE
Spark Plug Style: Angled
Suggested Spark Plug: Autolite AR3935
Valve Guides: Powdered Metal
Valve Guide Spacing: 2.013"
Valve Stem Diameter: 8.000mm
Valve Seats: Yes. Copper Infiltrated
Valve Job: Multi-Angle
Intake Valve Diameter: 2.165"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.600"
Exhaust Valve Included: Yes
Suggested Valve Length: 4.880"
Valve Spring Pockets: 1.350" diameter MAX
Valve Springs Included: Yes 1.295" Dual
Valve Spring Application Hydraulic Roller .650" max Lift
Valve Springs Retainers Included: Yes, Titanium
Valve Locks Included: Yes
Valve Seals Included: Yes
Rocker Studs Included: No
Guide Plates Included: No
Valve Cover Mounting Style: Centerbolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts:
Suggested Head Studs:
Suggested Stud Girdle: NA
Head Bolt Torque with Oil:
Rocker Stud Torque with Oil:
Intake Bolt Torque with Oil:
Manufacturer: Dart Machinery
Manufacturer's Part Number: 11030153
Weight: 23lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each |