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Manley 11583-8 Severe Duty Intake Valve NK-844 Stainless 2.020in Head

Manufacturer

Picture for manufacturer Manley

Part Number

11583-8
8 reviews
Sale Price

$301.07

2 left at this price

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Manley 11583-8 Severe Duty Series performance intake valves are engineered for high-performance and race engine applications. Constructed from NK-844 stainless steel with a chrome-plated stem and hardened valve tip, these valves deliver exceptional durability under the extreme heat and pressure demands of performance engines. Each valve is swirl polished and fully machined for precision fitment and consistent performance.

Key Features:

  • Valve type: Intake
  • Head diameter: 2.020 in.
  • Stem diameter: 0.3415 in. (11/32)
  • Overall length: 5.015 in.
  • Installed height: 0.100 in. longer than stock
  • Tip length: 0.250 in.
  • Underhead angle/radius: 10 degrees x 3/8 in.
  • Margin: 0.070 in.
  • Seat width: 0.080 in.
  • Top of head: 7-degree dish
  • Weight: 113 grams per valve
  • Straight stem design for increased durability
  • NK-844 stainless steel construction with chrome stem
  • Hardened valve tip for long-term wear resistance
  • Swirl polished and fully machined finish

The Severe Duty Series is Manley's answer to the rigorous demands of race and high-performance street engines. The NK-844 stainless steel alloy provides superior heat and corrosion resistance, while the chrome stem reduces friction and wear against the valve guide.

Products specifications

Approximate Weight (g)

152

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

6.400 in.

Overall Valve Length (mm)

162.560mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

Yes

Valve Head Diameter (in)

1.940 in.

Valve Head Diameter (mm)

49.276mm

Valve Head Style

20 degree dish

Valve Material

NK-842 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.341 in.

Valve Stem Diameter (mm)

8.661mm

Valve Tip Length (in)

0.250 in.

Valve Tip Length (mm)

6.350mm

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