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Manley 11312-8 Race Series Pro Flo Intake Valve NK-842 Stainless 2.000 in. Head

Manufacturer

Picture for manufacturer Manley

Part Number

11312-8
7 reviews
Sale Price

$188.69

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Manley 11312-8 Race Series Pro Flo Intake Valve is engineered for bracket racing, oval track, and high-performance street engine applications. Crafted from NK-842 stainless steel with a chrome-plated stem and hardened tip, each valve is swirl polished and fully machined for exceptional durability and consistent performance under demanding conditions.

The undercut stem design promotes improved airflow into the combustion chamber, while the 12-degree x 3/8 in. Pro Flo underhead radius further optimizes flow characteristics. With a stock installed height, these valves are a direct-fit upgrade suitable for a wide range of performance engine builds.

Valve Specifications:

  • Valve Type: Intake
  • Head Diameter: 2.000 in.
  • Stem Diameter: 0.3415 in. (11/32)
  • Overall Length: 4.900 in.
  • Tip Length: 0.250 in.
  • Installed Height: Stock
  • 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 with chrome stem and hardened tip

Note: Measure your existing valve head and stem diameter before ordering to confirm proper fitment.

Products specifications

Approximate Weight (g)

141

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

5.105 in.

Overall Valve Length (mm)

129.7mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

2.250 in.

Valve Head Diameter (mm)

57.2mm

Valve Head Style

7 degree dish

Valve Material

NK-842 stainless steel

Valve Seat Width (in)

0.080 in.

Valve Stem Diameter (in)

0.372 in.

Valve Stem Diameter (mm)

9.4mm

Valve Tip Length (in)

0.225 in.

Valve Tip Length (mm)

5.72mm

Simple. Great service!

Excellent service and communication.

I got the items exactly as described with VERY fast shipping. i highly recommend them to everyone. And I will definitely be shopping there again!

Great prices, clear information and fast shipping!

Thanks for the great price

Super fast shipping, exactly as ordered, no drama, problems or complications

Although there was a mix up with the shipping on my order customer service was helpful and expedited the solution and made it worth my trouble. I will be keeping Autoplicity in mind for any other parts I might need for my Jeep.

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