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Chevrolet Performance 19300955

Small Block Chevy Fast Burn Aluminum Cylinder Head, Assembled

Chevrolet Performance 19300955

809-19300955

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Chevrolet Performance 19300955 Small Block Chevy Fast Burn Aluminum Cylinder Head, Assembled $819.02
Small Block Chevy Fast Burn Aluminum Cylinder Head
  • 210cc Intake Ports
  • 62cc Combustion Chambers
  • Valves: 2.000'' Intake/1.550'' Exhaust
  • Assembled
  • Sold Individually

  • Chevrolet Performance 19300955 Details

    "Fast Burn" Aluminum Cylinder Heads

    This Cylinder head assembly is identified by the Chevrolet "Bowtie" logo engraved on the end surface of the cylinder head, this replaces the "GM Performance Parts" logo that was formerly used. This head is assembled using Chevrolet Performance "blue" beehive-style valve springs, part 809-12625033, using compatible spring retainers, seats and split key locks. These components were changed to provide maximum durability and stability at the sustained RPM typically experienced in circle track racing.

    Head is sold assembled with the following Chevrolet components:
  • Bare Head - 12497186
  • Intake Valves - 12555331
  • Exhaust Valves - 12551313
  • Valve Springs - 12625033
  • Rocker Studs - 12552126
  • Valve Stem Seals - 10212810

    Installation Notes:
  • Exhaust Gasket - 375-1470 (may require minor trimming)
  • Intake Gasket - 809-12497760 or 375-1289
  • Head Gasket - must use head gaskets with stainless steel fire rings 809-10105117 or 809-12557236 used on Chevrolet Performance Engines.

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Volume (cc)
    62
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    D-Port
    Exhaust Valve Diameter (in.)
    1.55
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    210
    Intake Valve Diameter (in.)
    2
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    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
    Yes
    Rocker Arms Included
    No
    Spark Plug Style
    Angled
    Steam Holes Drilled
    No
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Material
    Steel
    Valve Seats Machined
    No
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Umbrella
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    19300955

    This Chevrolet Performance Small Block Chevy "Fast Burn" Aluminum Cylinder Head has the highest performance potential of any 23° small block head developed by Chevrolet using flat top pistons. It adds 30 bolt-on horsepower when used on the Chevy ZZ4 crate engine. 62cc fast burn combustion chambers produce higher cylinder pressures by burning more of the available fuel before the piston starts its power stroke downward. Head surfaces and rocker rails are CNC-machined to exact tolerances, thus eliminating the need for blueprinting. D-shaped ports and runners require no additional porting (but can be for all-out racing applications). This cylinder head fits 1958-Present small block Chevy 283-400 engines with a conventional water flow design (cannot be used on LT1, LT4, or LS1 engine with reverse water flow). The cylinder head is completely assembled with valves, springs, retainers, and 3/8'' rocker studs that require the use of self-aligning rocker arms.

    Specifications
  • Aluminum Construction
  • Intake Runner: 210cc Port raised .240''
  • Exhaust Runner: 78cc ''D'' Port raised .200''
  • Combustion Chamber Volume: 62cc
  • Deck: .400'' thick (Can be milled)
  • Valve Diameter: 2.00'' Intake, 1.55'' Exhaust
  • Valve Spring Seat: 1.48''
  • Valve Springs: .530'' Maximum Valve Lift
  • Rocker Studs: 3/8'' Top, 7/16'' Bottom
  • Spark Plugs: Angled, 5/8'' Hex, 3/4'' Reach, Tapered Seat
  • Dual Intake Bolt Pattern for Vortec (recommended) and Early Intakes
  • Dual Valve Cover Bolt Pattern for Perimeter or Centerbolt

    JEGS Easy Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.

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