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Milodon 45470-8

Megaflow Intake Valves Pontiac - 350, 389, 400, 421, 428, 455 (1971-79)

Milodon 45470-8

697-45470-8

made in usa
jegs shipping
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Estimated ship date 11/30/17 if Ordered Today
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Milodon 45470-8 Megaflow Intake Valves Pontiac - 350, 389, 400, 421, 428, 455 (1971-79) $173.95
Megaflow Intake Valves
  • Pontiac - 350, 389, 400, 421, 428, 455 (1971-79)
  • Head Diameter: 2.11''
  • Length: 4.890''
  • 8/pkg

  • Milodon 45470-8 Details

    Pontiac - 350, 389, 400, 421, 428, 455

    Specs:
  • Type: Intake
  • Head Diameter: 2.11''
  • Stem Diameter: .341''
  • Length: 4.890'' (1971-79)
  • Tip Length: .250''
  • Head Angle/Radius: 12° 3/8''R
  • Margin: .060''
  • Seat: .060''
  • Grams: 119.9

  • Specifications:

    Lock Groove Quantity
    1-groove
    Lock Groove Style
    Conventional
    Overall Valve Length (in.)
    4.98
    Overall Valve Length (mm)
    126.492
    Quantity
    Sold as a set of 8
    Swirl-Polished
    Yes
    Undercut Stem
    Yes
    Valve Head Diameter (in.)
    2.11
    Valve Head Diameter (mm)
    53.594
    Valve Head Style
    12 degree dish
    Valve Material
    21-4N stainless steel
    Valve Seat Width (in.)
    0.06
    Valve Stem Diameter (in.)
    0.341
    Valve Stem Diameter (mm)
    8.661
    Valve Tip Length (in.)
    0.25
    Valve Tip Length (mm)
    6.35
    Manufacturer's Part Number:
    45470-8

    At a normal intake valve temperature of 1200°F, Milodon Megaflow Valves have a tensile strength of 85,000 PSI (equals 165,000 PSI at room temperature). At a normal exhaust valve temperature of 1400°F, Megaflow Valves have a tensile strength of 63,000 PSI (equals 165,000 PSI at room temperature).

    Deep hard chroming on stems for superior wear resistance. Smooth transition from stem to valve head aiding both flow and strength. Close tolerance stem grinding for no variation from valve to valve. Single keeper groove for increased stem strength. Compatible with either 7° or 10° retainers.

    Features:
  • Premium Quality 21-4N Material on All Valves
  • Every Milodon Valve is a One-Piece Forging
  • 1600ºF Operating Temperature
  • Swirl Polished for Flow and Tulipped Heads for Weight Savings
  • Undercut Stems for Greatest Flow and Lightness
  • Satellite Tips Hardened to 5S-60 Rc. Hold Up to High Valve Train Loads

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