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Manley 11549-8 Severe Duty Intake Valve 2.020in Head NK-844 Stainless

(2005-2013 Chevrolet Corvette)

Manufacturer

Picture for manufacturer Manley

Part Number

11549-8
6 reviews
Sale Price

$293.10

Estimated ship date Saturday, November 21

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Product Details

The Manley 11549-8 is a Severe Duty Series performance intake valve engineered for high-output and race applications. Constructed from NK-844 stainless steel with a chrome-plated stem and hardened tip, these valves are swirl-polished and fully machined for superior flow characteristics and long-term durability under extreme operating conditions.

Key Specifications:

  • Valve Type: Intake
  • Head Diameter: 2.020 in.
  • Stem Diameter: 0.3415 in. (11/32)
  • Overall Length: 5.015 in.
  • Installed Height: 0.100 in. longer than stock
  • Tip Length: 0.250 in.
  • Underhead Angle/Radius: 10 degrees x 3/8 in.
  • Margin: 0.070 in.
  • Seat Width: 0.080 in.
  • Top of Head: 7-degree dish
  • Weight: 113 grams (0.249 lbs) per valve

Construction & Features:

  • NK-844 stainless steel construction for excellent heat and corrosion resistance
  • Chrome-plated stem for reduced wear and improved durability
  • Hardened valve tip for long service life under high-lift cam applications
  • Swirl-polished finish promotes optimal port flow efficiency
  • Straight stem design for maximum strength and longevity
  • Fully machined to precise tolerances for consistent performance

Manley's Severe Duty Series valves are a trusted choice for serious performance builders and racing applications where stock valves simply cannot withstand the demands of elevated RPM, increased lift, and aggressive camshaft profiles.

Products specifications

Fits

2005-2013 Chevrolet Corvette

Approximate Weight (g)

107

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

5.075 in.

Overall Valve Length (mm)

128.905mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

Yes

Valve Head Diameter (in)

1.600 in.

Valve Head Diameter (mm)

40.640mm

Valve Head Style

7 degree dish

Valve Material

XH-428 stainless steel

Valve Seat Width (in)

0.100 in.

Valve Stem Diameter (in)

0.371 in.

Valve Stem Diameter (mm)

9.423mm

Valve Tip Length (in)

0.220 in.

Valve Tip Length (mm)

5.588mm

Extremely Happy! Best price on the web, easy order tracking, if only all online orders from other sources were this easy. I ordered a component from another online retailer who showed parts "in stock" only to see my status as "sent to warehouse" and it was weeks. When Autoplicity shows "in stock" it really was and delivered right away.

I ordered an Optima battery for my truck after I did a Google search for the battery. Autoplicity was the cheapest on the Web. Even cheaper then eBay. They got me hooked. Thanks Autoplicity

Good.

Best prices online for a locker and pretty fast shipping too!

I have place my order on line and I am very satisfied with your services , I wil recommend every one to purchase from you

Awesome place to get parts from. Went looking all over the city of houston to find a certain light everyone was sold out tried online two "Huge chain name" places were also sold out. Stumbled on Autoplicity and they had just what I needed!

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