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Manley 11303-8 Race Series Intake Valve 2.000in Head NK-842 Stainless Steel

Manufacturer

Picture for manufacturer Manley

Part Number

11303-8
4 reviews
Sale Price

$202.55

2 left at this price

delivery box

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 11303-8 Race Series Intake Valve is a high-performance forged stainless steel valve engineered for bracket racing, oval track competition, and high-performance street engines. Constructed from NK-842 stainless steel with a chrome-plated stem and hardened tip, this valve delivers exceptional durability and heat resistance under demanding operating conditions.

The Pro Flo undercut stem design reduces stem diameter in the port area to minimize flow restriction and turbulence, improving overall airflow into the combustion chamber. Each valve is swirl polished and fully machined to tight tolerances for consistent performance across all cylinders.

Key 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° x 3/8 in. (Pro Flo)
  • Margin: 0.050 in.
  • Seat Width: 0.080 in.
  • Top of Head: 7° dish
  • Valve Weight: 109 grams per valve
  • Stem Finish: Chrome
  • Tip: Hardened
  • Material: NK-842 Stainless Steel

Note: Always measure existing valve head diameter and stem diameter before ordering replacement valves to confirm fitment.

Products specifications

Approximate Weight (g)

97

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

5.040 in.

Overall Valve Length (mm)

128.0mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

No

Valve Head Diameter (in)

1.625 in.

Valve Head Diameter (mm)

41.3mm

Valve Head Style

9 degree dish

Valve Material

XH-426 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.311 in

Valve Stem Diameter (mm)

7.9mm

Valve Tip Length (in)

0.290 in.

Valve Tip Length (mm)

7.37mm

Great transaction. The bike rack was about $90 less than a local retailer, and shipping was faster than promised. I wish all internet retailers were this reliable and useful.

Quick shipping on my order. Thanks

It was easy to order and the truck bed extender we bought was the lowest price we could find! However, the shipping charge was higher than what was posted on the comparison sight. Nevertheless, it still came in under the next highest price from a different vendor.

Order arrived quickly and was exactly as described. Great prices and service!

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