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Dart 11111111L

LT1/LT4 Pro 1 Assembled



Dart 11111111L

Part Number: 301-11111111L

LT1/LT4 Pro 1
  • Assembled
  • Intake Valve: 2.020''
  • Exhaust Valve: 1.600''
  • Valve Springs: 1.250"
    (110 lbs @ 1.70", .510" max lift)
  • $908.34
    Ships 10/06/16
    if Ordered Today
    Made In USA
    FREE Shipping
    Dart 11111111L LT1/LT4 Pro 1 Assembled $908.34

    Dart 11111111L Details

    LT1/LT4

  • Intake Ports: 180cc

    Specifications:
  • Valvetrain: Standard SBC 3/8" stud mount or can be modified to 7/16"
  • Intake Port Location: Stock
  • Intake Port Dimensions: 1.190" x 2.075"
  • Intake Flow: 257 cfm @ .500" lift/28"
  • Exhaust Port Location: Stock
  • Exhaust Port Dimensions: 1.410" x 1.350"
  • Exhaust Flow: 172 cfm @ .500" lift/28"
  • Manifold: LT-style
  • Pushrod Length: Stock (should always measure)
  • Pushrod Guide Plate: Not used (uses stock-type self-aligning rockers)
  • Retainers: Steel 7°
  • Stud Girdle: Any standard girdle
  • Valve Length: 4.890"
  • Valve Stem Diameter: .3415", 11/32"
  • Valve Guides: .439" OD Mag-Bronze (.002" press)
  • Valve Guide Length: 2.100"
  • Valve Guide Clearance: .0014" to .002" (using Dart .3415" valve stem)
  • Valve Guide Spacing: Moved .030" from stock
  • Valve Seats: Hardened Ductile Iron, .006" press
  • Valve Seat Dimensions: Intake 2.160" x 1.810" x .350", Exhaust 1.650" x 1.350" x .350"
  • Valve Seat Angles: Intake 32°, 45°, 60°, 70°; Exhaust 37°, 45°, radius

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Style
    Heart
    Combustion Chamber Volume (cc)
    64
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Square
    Exhaust Runner Volume (cc)
    75
    Exhaust Valve Angle
    23
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    Yes
    Guideplates Included
    Yes
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    180
    Intake Valve Angle
    23
    Intake Valve Diameter (in.)
    2.02
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.52
    Number of Springs Per Valve
    Single
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.25
    Quantity
    Sold individually
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Angled
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Center and perimeter bolt
    Valve Guide Material
    Manganese bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    4-angle intake/3-angle exhaust
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Positive stop
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    11111111L

    The Dart LT1/LT4 Pro 1 Aluminum Cylinder Heads have advanced features including five angle intake seats and back cut valves that provide shear points for the fuel to go into suspension as it enters the combustion chamber. The spark plugs are located as close to the top and center of the combustion chambers as possible, shortening the distance that the flame front must travel and producing a more uniform pressure rise in the cylinder. They are offered as either bare castings or fully assembled and accept all early and late model accessory brackets!

    Features:
  • Premium Aluminum: 355-T61 Alloy
  • Bolt on Compatibility: Off the Shelf Pistons & Valve Train
  • Hardened Exhaust Seats: For Unleaded Gasoline
  • Valve Guides: Manganese Bronze
  • Combustion Chambers: 58cc
  • Spark Plugs Location: Angled
  • Intake Valve: 2.020 or 2.050''
  • Exhaust Valve: 1.600''
  • Sold Individually.

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