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Manley 11390-8 Stainless Steel Performance Intake Valve Head - 2.055

(1998-2002 Chevrolet Camaro; 1997-2004 Chevrolet Corvette; 2004 Pontiac GTO; 1998-2002 Pontiac Firebird; 2004-2005 Cadillac CTS; 2010-2013 Kia Optima)

Part of: Manley Stainless Steel Performance Intake Valve Head

Other options in this family: Manley 11363-8 Manley 11365-8

Manufacturer

Picture for manufacturer Manley

Part Number

11390-8
6 reviews
Sale Price

$188.69

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Manley 11390-8 is a premium stainless steel intake valve engineered for high-performance applications. Featuring a 2.055" head diameter and .3133" stem diameter, this valve is precision-manufactured from Manley's Race Series stainless alloy to deliver exceptional flow and durability in demanding environments.

Key Specifications:

  • Head Diameter: 2.055 inches
  • Stem Diameter: .3133 inches
  • Overall Length: 4.874 inches
  • Tip Length: .175 inches
  • Underhead Design: Pro Flo 12 x 3/8 inch
  • Margin: .050 inches
  • Seat Width: .095 inches
  • Top of Head: 7° Dish
  • Weight: 106 grams
  • Installed Height: Stock

Performance Features:

  • Chrome-plated stems for superior wear resistance
  • Swirl-polished underheads for improved flow characteristics
  • Fully hardened tips to prevent premature wear
  • Completely machined combustion faces for consistent performance
  • Pro-Flo design with reduced stem diameter in the fillet area for increased airflow and reduced weight
  • Precise stem-to-seat concentricity for optimal sealing

Manley's Race Series stainless steel valves are manufactured to the highest quality standards and are suitable for applications ranging from street performance builds to extreme racing engines producing over 1000 horsepower. With over 40 years of manufacturing experience, Manley continues to set the industry standard for performance valvetrain components.

Products specifications

Fits

1998-2002 Chevrolet Camaro; 1997-2004 Chevrolet Corvette; 2004 Pontiac GTO; 1998-2002 Pontiac Firebird; 2004-2005 Cadillac CTS; 2010-2013 Kia Optima

Approximate Weight (g)

106

Lock Groove Quantity

1-groove

Lock Groove Style

Conventional

Overall Valve Length (in)

4.874 in.

Overall Valve Length (mm)

123.8mm

Quantity

Sold as a set of 8.

Swirl Polished

Yes

Undercut Stem

Yes

Valve Head Diameter (in)

2.055 in.

Valve Head Diameter (mm)

52.2mm

Valve Head Style

7 degree dish

Valve Material

NK-842 stainless steel

Valve Seat Width (in)

0.095 in.

Valve Stem Diameter (in)

0.313 in.

Valve Stem Diameter (mm)

8.0mm

Valve Tip Length (in)

0.175 in.

Valve Tip Length (mm)

4.45mm

Very pleasant order over the phone. Gentleman was smart, cheerful and helpful.

Best price for product ordered

Easy as pie!

Just what you want from a merchant but don't expect; fast, courteous service and attention to the details of your order. I'm a happy consumer. Thank you, Autoplicity. I'll be back.

Autoplicity cares about there customers. I ordered a flash programmer and got to the last page and never got a confirmation of the order. I used the website chat and talked to somebody about it right away. So I ordered again and got a conformation. But both went though. Autoplicity called me next day a.m. to see if I made a mistake. Thanks for letting me know and correcting to one order. Saved me from shipping back a product I dind't need.

Good products with low prices. Easy website and pament options.

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