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Manley Severe Duty Series Stainless Steel Valves 11677-8
Part Number: MAN-11677-8
Manley Severe Duty Series Stainless Steel Valves
Valve, Severe Duty, XH-426 Stainless Steel, Exhaust, 1.600 in. Diameter, 4.923 in. Length, Each
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Estimated Ship Date: Nov 2, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
11677-8
Part Type:
Product Line:
Summit Racing Part Number:
MAN-11677-8
UPC:
807298062792
Valve Position:
Exhaust
Exhaust Valve Head Diameter (in.):
1.600 in.
Exhaust Valve Head Diameter (mm):
40.640mm
Exhaust Valve Stem Diameter (in.):
0.314 in.
Exhaust Valve Stem Diameter (mm):
7.96mm
Exhaust Overall Valve Length (in.):
4.923 in.
Exhaust Overall Valve Length (mm):
125.044mm
Undercut Stem:
Yes
Swirl-Polished:
Yes
Valve Tip Length (in.):
0.175 in.
Valve Tip Length (mm):
4.445mm
Valve Material:
XH-426 stainless steel
Lock Groove Quantity:
1-groove
Lock Groove Style:
Conventional
Approximate Weight (g):
92
Valve Head Style:
18 degree dish
Valve Seat Width (in.):
0.115 in.
Quantity:
Sold as a set of 8.
Manley Severe Duty Series Stainless Steel Valves
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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