Availability

- In Stock Items, Including at a Supplier. Ships In a Few Days. (3) 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.
- All Items, Including Not In Stock (5) 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.
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Valve Position
- Exhaust (2) 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.)
- 1.775 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. (2) 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)
- 45.085mm (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 (2) 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.)
- 0.342 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.)
- 0.342 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.
- 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)
- 8.69mm (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)
- 8.69mm (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.
- 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.)
- 4.730 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 Pro Flo Series Stainless Steel Valves

5.0 out of 5 stars 5 Customer Reviews

Manley Severe Duty Pro Flo Series intake and exhaust 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 fully machined and swirl polished, and offer improved flow with undercut "Pro Flo" stems. Many size options are available, for applications from 1955 and up.

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