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Manley 11323-8 Race Series NK-842 Stainless Intake Valves

Manufacturer

Picture for manufacturer Manley

Part Number

11323-8
6 reviews
Sale Price

$188.69

Estimated ship date Friday, November 20

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Each valve is precision-manufactured from NK-842 stainless steel — Manley's proprietary intake alloy — delivering superior fatigue strength and durability compared to standard EV-8 (21-4N) alloy valves.

These intake valves feature the Pro Flo (Race Flo) undercut stem design, which reduces stem diameter through the fillet area to promote increased airflow and reduce valve weight. Combined with a swirl-polished underhead and fully machined combustion face, the Pro Flo profile optimizes flow efficiency at the seat. Chrome-hardened stems and hardened valve tips provide enhanced wear resistance and long service life.

Specifications:

  • Valve Type: Intake
  • Head Diameter: 2.000 in.
  • Stem Diameter: 0.3415 in. (11/32)
  • Overall Length: 4.900 in.
  • Installed Height: Stock
  • Tip Length: 0.250 in.
  • Underhead Angle / Radius: 12 degrees x 3/8 in. (Pro Flo)
  • Margin: 0.050 in.
  • Seat Width: 0.080 in.
  • Top of Head: 7-degree dish
  • Weight: 109 grams per valve
  • Material: NK-842 stainless steel
  • Stem Finish: Chrome-hardened

Manley's Race Series valves are the recommended choice for engines operating under 8,000 RPM. For higher RPM applications, Manley's titanium valve lineup should be considered. Note: Measure existing valve head and stem diameter before ordering to confirm fitment.

Products specifications

Approximate Weight (g)

111

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

5.265 in.

Overall Valve Length (mm)

133.7mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

1.600 in.

Valve Head Diameter (mm)

40.6mm

Valve Head Style

9 degree dish

Valve Material

XH-426 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.342 in.

Valve Stem Diameter (mm)

8.7mm

Valve Tip Length (in)

0.290 in.

Valve Tip Length (mm)

7.37mm

very good prices. good service.I am a future customer.thanks.

Timing gearset arrived in under 48 hrs! Gears look well made. Can't wait to get them on my car. Thanks for the great service!

Great Products, Very Cheap, Fast Shipping. Will be a returning Customer. A+++

Very good product, the green caliper paint is great.

So far pleased

Product was shipped super fast. And product was in a well packaged box and everything was there. I would do business with them again in the future. Highly recommended and lowest prices!!!

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