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Manley Extreme Duty Series Valves
Valves, Extreme Duty Series, Exhaust, 1.610 in. Diameter, XH-432 Xtreme Alloy, Chevy, 7.0L LS, Set of 8
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
11687-1
Part Type:
Product Line:
Summit Racing Part Number:
MAN-11687-1
UPC:
807298056586
Valve Position:
Exhaust
Exhaust Valve Head Diameter (in.):
1.610 in.
Exhaust Valve Head Diameter (mm):
40.894mm
Exhaust Valve Stem Diameter (in.):
0.314 in.
Exhaust Valve Stem Diameter (mm):
7.97mm
Exhaust Overall Valve Length (in.):
5.230 in.
Exhaust Overall Valve Length (mm):
132.842mm
Undercut Stem:
No
Swirl-Polished:
Yes
Valve Tip Length (in.):
0.290 in.
Valve Tip Length (mm):
7.366mm
Valve Material:
XH-432 Xtreme alloy
Lock Groove Quantity:
1-groove
Lock Groove Style:
Conventional
Approximate Weight (g):
103
Valve Head Style:
18 degree dish
Valve Seat Width (in.):
0.100 in.
Quantity:
Sold individually.
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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