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Manley 11728-8 Pro Flo Intake Valve NK-842 Stainless 2.000in Head 4.900in Length

(2004-2007 Porsche 997)

Manufacturer

Picture for manufacturer Manley

Part Number

11728-8
8 reviews
Sale Price

$188.69

Estimated ship date Friday, November 20

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Fitment guaranteed

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Product Details

The Manley 11728-8 Pro Flo Intake Valve is a race-proven, high-performance intake valve engineered for bracket racing, oval track competition, and demanding high-performance street engines. Crafted from NK-842 stainless steel with a chrome-plated stem and hardened tip, this valve delivers exceptional durability and heat resistance under extreme operating conditions.

The Pro Flo undercut stem design promotes improved airflow into the combustion chamber, while the swirl-polished, fully machined finish ensures consistent performance across all eight valves in the set. The 7-degree dish top of head and precision-ground seat geometry help optimize cylinder filling for maximum power output.

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

Products specifications

Fits

2004-2007 Porsche 997

Easy, customer-friendly online shopping. I am satisfied.

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