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Manley 11313-8 Race Series Pro Flo Intake Valve 2.000 in. Head NK-842 Stainless Steel

Manufacturer

Picture for manufacturer Manley

Part Number

11313-8
8 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

The Manley 11313-8 Race Series Pro Flo Intake Valves are engineered for demanding performance applications including bracket racing, oval track competition, and high-performance street engines. Constructed from NK-842 stainless steel with a chrome-plated stem and hardened valve tip, these valves deliver the durability and reliability required under sustained high-RPM conditions.

Each valve features a swirl-polished finish and is fully machined with an undercut stem for improved airflow and reduced weight. The Pro Flo underhead profile (12-degree angle x 3/8 in. radius) promotes efficient charge movement into the combustion chamber, maximizing volumetric efficiency.

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
  • Material: NK-842 Stainless Steel with Chrome Stem
  • Weight: 109 grams per valve

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

Products specifications

Approximate Weight (g)

117

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)

1.750 in.

Valve Head Diameter (mm)

44.5mm

Valve Head Style

9 degree dish

Valve Material

XH-426 stainless steel

Valve Seat Width (in)

0.100 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

This was my first purchase from Autoplicity, I bought a HyperTech tuner for my truck, they had absolutely the lowest price of anywhere I looked by far. Only thing I could fault them on is that it took 3 days for the product to ship, a little bit long I feel for something that was in stock, but Ill overlook it since it was such a great price.

Good price, communication good but not great. Shipped promptly.

Best prices online for hard to find parts!

Had the best price on the Thule bike rack I was looking for. Bought online on Friday....shipped on Monday. Looking forward to buying more things here!

great buying experience

Very quick service and prompt shipping.

PART CAME IN FAST!!! Can't wait to tear it open

I had never heard of Autoplicity prior to this purchase, so I was a little hesitant to order from them. Man I am glad that I did!! Not only did they have the lowest price (by FAR) on the product I was looking for, but it showed up to my doorstep just TWO days after placing my order!! Autoplicity is awesome and will definitely be getting future business from me!!

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