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Manley Extreme Duty Series Valves
Valve, Intake, Stainless Steel, 1.900 in. Diameter, 0.342 in. Stem, 5.522 in. Length, Chevrolet, Each
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Estimated Ship Date: Nov 2, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
11739-1
Part Type:
Product Line:
Summit Racing Part Number:
MAN-11739-1
UPC:
807298051857
Valve Position:
Intake
Intake Valve Head Diameter (in.):
1.900 in.
Intake Valve Head Diameter (mm):
48.260 mm
Intake Valve Stem Diameter (in.):
0.342 in.
Intake Valve Stem Diameter (mm):
8.69mm
Intake Overall Valve Length (in.):
5.522 in.
Intake Overall Valve Length (mm):
140.259mm
Undercut Stem:
No
Swirl-Polished:
Yes
Valve Tip Length (in.):
0.250 in.
Valve Tip Length (mm):
6.350mm
Valve Material:
XH-432 Xtreme alloy
Lock Groove Quantity:
1-groove
Lock Groove Style:
Conventional
Approximate Weight (g):
136
Valve Head Style:
9 degree dish
Valve Seat Width (in.):
0.085 in.
Quantity:
Sold individually.
Notes:
Underhead angle/radius 15 degree x .500 in. Margin 0.075 in.
Manley Extreme Duty Series Valves
Manley Extreme Duty Series performance valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best materials available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.
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