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Manley Extreme Duty Series Stainless Steel Valves 11687-1 Valves, Series, Exhaust, 1.610 in. Diameter, XH-432 Xtreme Alloy, Chevy, 7.0L LS, Set of 8

SKU: MAN11687-1

Valves

Manley Extreme Duty Series Stainless Steel Valves 11687-1 Valves, Series, Exhaust, 1.610 in. Diameter, XH-432 Xtreme Alloy, Chevy, 7.0L LS, Set of 8

SKU: MAN11687-1

Valves
A$160.69
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Manley Extreme Duty Series performance steel 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 stainless steel 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.

Part Type

Valves

Data: v4.2 - Upd: 2026-10-14 10:06:31

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11687-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Extreme Duty Series Stainless Steel Valves
Product Attributes - UPC
807298056586
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.610 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
40.894mm
Product Attributes - Exhaust Valve Stem Diameter (in.)
0.314 in.
Product Attributes - Exhaust Valve Stem Diameter (mm)
7.97mm
Product Attributes - Exhaust Overall Valve Length (in.)
5.230 in.
Product Attributes - Exhaust Overall Valve Length (mm)
132.842mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.290 in.
Product Attributes - Valve Tip Length (mm)
7.366mm
Product Attributes - Valve Material
XH-432 Xtreme alloy
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
103
Product Attributes - Valve Head Style
18 degree dish
Product Attributes - Valve Seat Width (in.)
0.100 in.
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11687-1
SFX Item ID 4932616
Supplier Item Code 4932616
Manufacturer SKU 11687-1
Manufacturer UPC 807298056586
Alternative References XH-432, 7.0L

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2011
    Engine TypeV8
    Engine Size7.0L/427
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration

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