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Dart 11521123P

Dart Assembled Platinum Pro 1 Aluminum Cylinder Head Straight Plug

301-11521123P

Free Shipping Ships directly from the manufacturer on 09/26/19
Save $20 Off $250, $50 Off $500, $100 Off $1,000, $150 Off $2,000. Promo Code: SAVEMORE exclusions apply

$921.14
Dart Assembled Platinum Pro 1 Aluminum Cylinder Head Straight Plug $921.14
Out of stock
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Assembled Platinum Pro 1 Aluminum Cylinder Head
  • Straight Plug
  • Valves: 2.05'' Intake, 1.60'' Exhaust
  • Dual Valve Springs: 1.550''
  • Specifications:

    Quantity
    Sold individually
    Cylinder Head Style
    Assembled
    Guideplates Included
    Yes
    Rocker Arm Studs Included
    Yes
    Accessory Bolt Holes Drilled
    Yes
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Damper Spring Included
    Yes
    Exhaust Valves Included
    Yes
    Heat Crossover
    No
    Intake Valves Included
    Yes
    Locks Included
    Yes
    Machined for O-Ring
    No
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Guides Included
    Yes
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Combustion Chamber Volume (cc)
    64
    Intake Port Location
    Standard
    Exhaust Port Location
    Standard
    Oiling Style
    Through pushrod
    Intake Valve Diameter (in.)
    2.05
    Exhaust Valve Diameter (in.)
    1.6
    Valve Guide Material
    Manganese bronze
    Intake Runner Volume (cc)
    215
    Valve Seat Material
    Ductile iron
    Valve Cover Mounting Style
    Center and perimeter bolt
    Intake Valve Angle
    23
    Valve Seat Machine Style
    4-angle intake/3-angle exhaust
    Exhaust Runner Volume (cc)
    75
    Outside Diameter of Outer Spring (in.)
    1.55
    Maximum Valve Lift (in.)
    0.69
    Number of Springs Per Valve
    Dual
    Retainer Material
    Steel
    Lock Style
    10 degree
    Exhaust Valve Angle
    23
    Spark Plug Style
    Straight
    Combustion Chamber Style
    Heart
    Valve Stem Seal Style
    Positive stop
    Manufacturer's Part Number:
    11521123P
    Shipping Weight:
    29

    As a direct result of Dart's wet-flow testing, the intake seats of these cylinder heads have five distinct angles. Each of the angles provides a shear point for the fuel to go into suspension before it enters a chamber. The heads also have back-cut valves, which make a big difference in how fuel is conditioned before entering combustion chambers. Result: the engine pulls more fuel and creates more power. Spark plugs are located as close to top center of the combustion chambers as possible. This shortens the flame's travel distance and produces a more uniform pressure rise in the cylinder to push pistons down.

    Features
  • Hardened Exhaust Seats
  • Multi-Angle Intake Seats
  • Dual Exhaust Bolt Pattern
  • C355-T61 Aerospace Alloy
  • Angled or Straight Spark Plugs
  • Manganese Bronze Valve Guides
  • Heart-Shaped Combustion Chambers
  • Sold Individually (Bare or Assembled)
  • Bolt-On Compatibility with Standard Valve Angle & Spacing

    Click the image for more Pro 1 details

  • Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

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