Valves
 
RaceValve
Manley Performance 
The acknowledged leader of the performance and racing valves in the world. 
Quality 
The distinguishing feature of every Manley valve. 
Selection 

The broadest in the industry. A Manley valve for every application and every budget.
 
  • Superior Strength Materials. 
  • Swirl Polished Underheads. 
  • Exact Stem to Seat Concentricity. 
  • Closely Controlled Margin Heights. 
  • Fully Machined Combustion Faces. 
  • Hard Chrome Stems.
  • Hard Tips
Budget Series: Replacement Valves
  • Stainless Steel ( XH-422 Exhaust and NK-840 Intake ). 
  • Chrome Stems and Hard Tips. 
  • Material and Heat Treatment Superior to Stock. 
  • Original Shapes with Forged and Machined Finishes. 
Budget Series: Performance Valves
  • Stainless Steel ( XH-422 Exhaust and NK-840 Intake ). 
  • Chrome Stems and Hard Tips. 
  • Swirl Polished and Fully Machined. 
  • Stock and 0.100" Longer Lengths Available. 
Street Series
  • Stainless Steel ( XH-424 Exhaust and NK-841 Intake ). 
  • Chrome Stems and Hard Tips. 
  • Swirl Polished and Fully Machined. 
  • Street Master ( Straight Stem ) and Street Flo Shapes Available. 
Race Series
  • Stainless Steel ( XH-426 Exhaust and NK-842 Intake ). 
  • Chrome Stems and Hard Tips. 
  • Swirl Polished and Fully Machined. 
  • Race Master ( Straight Stem ) and Race Flo Shapes Available. 
  • Stock and Longer than Stock Lengths Available.
Pro Series
  • Special XH-427 Material for Alcohol Buring Race Engines.
Severe Duty® Series
  • Superior Stainless for High Temperature Gasoline Engines. 
  • Exhaust Material XH-428 with Double the Ultimate Tensile Strength ( at 1500 degree Fahrenheit ) of Imported Valves.
  • Intake Material NK-844 with 1000 times Better Fatigue Strength than Imported Valves.
Extreme Duty Series
  • Top Fuel, Funny Car and Marine Engine Exhaust Valves. 
  • More Hot Hardness and High Temperature Strength than any Competitive Offerings. 
  • Exotic XH-430 Inconel Material.

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