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Manley Extreme Duty Series Stainless Steel Valves 12357-1 Valves, Exhaust, Series, Stainless, 1.600 in. Diameter, 0.314 in. Stem, Chevy, 6.2L, Set of 8

SKU: MAN12357-1

Valves

Manley Extreme Duty Series Stainless Steel Valves 12357-1 Valves, Exhaust, Series, Stainless, 1.600 in. Diameter, 0.314 in. Stem, Chevy, 6.2L, Set of 8

SKU: MAN12357-1

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 10:07:18

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
12357-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Extreme Duty Series Stainless Steel Valves
Product Attributes - UPC
807298105949
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.600 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
40.640mm
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.)
5.215 in.
Product Attributes - Exhaust Overall Valve Length (mm)
132.461mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.160 in.
Product Attributes - Valve Tip Length (mm)
4.064mm
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)
96
Product Attributes - Valve Head Style
18 degree dish
Product Attributes - Valve Seat Width (in.)
0.115 in.
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man12357-1
SFX Item ID 4932105
Supplier Item Code 4932105
Manufacturer SKU 12357-1
Manufacturer UPC 807298105949
Alternative References 6.2L

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine Size6.2L/376
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration

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