Availability

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Valve Position
- Exhaust (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Intake (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Head Diameter (in.)
- 2.020 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Head Diameter (in.)
- 1.600 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Head Diameter (mm)
- 51.308mm (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Head Diameter (mm)
- 40.640mm (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Stem Diameter (in.)
- 0.371 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Stem Diameter (in.)
- 0.371 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Stem Diameter (mm)
- 9.42mm (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Stem Diameter (mm)
- 9.42mm (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Overall Valve Length (in.)
- 4.980 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.

Manley Severe Duty Series Stainless Steel Valves

4.94 out of 5 stars 17 Customer Reviews

Manley Severe Duty series performance valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are made of superior materials, are fully machined and swirl polished, and are available with either undercut "Pro Flo" stems or straight stems.

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