Manley Race Flo Stainless Steel Exhaust Valves (2.3 EcoBoost)

Manley intake valves typically are built with our original "Pro-Flo" design which reduces the stem diameter in the fillet area for increased airflow but also less valve weight.

  • NK-842 Stainless Intake Material
  • Swirl Polished and Fully Machined
  • Chrome Stems and Hard Tips
Manley Race Flo SS Exhaust Valves (2.3 EcoBoost)


Manley Performance continues to re-define itself in a high performance aftermarket industry that is constantly evolving. We've developed new products for growing markets such as sport compact, Ford modular and Chevy LS; as well as maintained our leadership role with the traditional V-8 engine business. Crankshafts, an expanded range of pistons and connecting rods, larger diameter pushrods as well as new valve and valve spring offerings are just a taste of what you’ll find in this catalog. The Manley custom Gen II stainless valve program is still second to none in the industry. Significant developments within our titanium valve line include an improved stem coating, lighter weight designs and greater shelf stock offerings.

Manley valves have set the standard for excellence in quality, material and design in the performance world for four decades. Manufactured from proven Race Master materials, Manley valves feature chrome stems, hard tips, fully machined surfaces and swirl polished radii. Many applications are Pro Flow design for maximum air flow. 

Head Diameter:     32.5mm or 33mm
Stem Diameter:     5.48mm/.2157" 
O/A Length:     103.55 mm
Tip Length:     4.00 mm
Underhead Angle/Radius:    Pro Flo: 22° x 5/16"
Margin:    .050
Seat Width:     .100"
Top of Head:     17° Dish

Note: Manley Performance strongly recommends that customers check their valve guide size in order to achieve the proper valve stem to guide clearance. Guides may need to be honed when replacing stock factory valves.


Available Intake Valve Sizes:

  • 32.5mm     11196-8
  • 33.0mm     11198-8



  • 2.3L Ford EcoBoost

warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

More Information
SKU Manley Race Flo SS Exhaust Valves (2.3 EcoBoost)
Product Type Engine
Engine Cylinders and Valvetrain
Brand Manley
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