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Manley 11898-8 Severe Duty Stainless Steel Intake Valves BBC 2.250in

Manufacturer

Picture for manufacturer Manley

Part Number

11898-8
5 reviews
Sale Price

$311.48

Estimated ship date Tuesday, November 17

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Product Details

The Manley 11898-8 Severe Duty series stainless steel intake valves are engineered for high-performance and race engine applications. Constructed from NK-844 stainless steel with chrome-plated stems and hardened valve tips, these valves are fully machined and swirl polished for superior durability and consistent performance under extreme operating conditions.

Key Features:

  • Material: NK-844 stainless steel construction with chrome stem and hardened tip
  • Valve Type: Intake
  • Head Diameter: 2.250 in.
  • Stem Diameter: 0.3415 in.
  • Overall Length: 5.605 in.
  • Installed Height: 0.350 in. longer than stock
  • Tip Length: 0.250 in.
  • Underhead Angle/Radius: 12 degrees x 3/8 in.
  • Margin: 0.065 in.
  • Seat Width: 0.100 in.
  • Top of Head: 7-degree dish
  • Weight per Valve: 150 grams
  • Stem Style: Straight stem for increased durability
  • Finish: Swirl polished, fully machined combustion face

Manley Severe Duty intake valves are a trusted choice for bracket racing, drag racing, oval track, and other high-performance builds demanding reliable valve train components. The NK-844 stainless steel alloy and chrome stem coating provide excellent wear resistance and long service life in high-heat, high-RPM environments.

Products specifications

Approximate Weight (g)

148

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

5.605 in.

Overall Valve Length (mm)

142.367mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

Yes

Valve Head Diameter (in)

2.250 in.

Valve Head Diameter (mm)

57.100mm

Valve Head Style

7 degree dish

Valve Material

NK-844 stainless steel

Valve Seat Width (in)

0.080 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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