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Manley Severe Duty Series Stainless Steel Valves 12342-1 Valve, Intake, Steel, 1.720 in. Head, 0.342 in. Stem, 4.911 in. Length, Chevy, Each

SKU: MAN12342-1

Valves

Manley Severe Duty Series Stainless Steel Valves 12342-1 Valve, Intake, Steel, 1.720 in. Head, 0.342 in. Stem, 4.911 in. Length, Chevy, Each

SKU: MAN12342-1

Valves
A$110.57
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

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.

Part Type

Valves

Data: v4.2 - Upd: 2026-10-14 17:10:11

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
12342-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Series Stainless Steel Valves
Product Attributes - UPC
807298083636
Product Attributes - Valve Position
Intake
Product Attributes - Intake Valve Head Diameter (in.)
1.720 in.
Product Attributes - Intake Valve Head Diameter (mm)
43.688mm
Product Attributes - Intake Valve Stem Diameter (in.)
0.342 in.
Product Attributes - Intake Valve Stem Diameter (mm)
8.69mm
Product Attributes - Intake Overall Valve Length (in.)
4.911 in.
Product Attributes - Intake Overall Valve Length (mm)
124.739mm
Product Attributes - Undercut Stem
Yes
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.250 in.
Product Attributes - Valve Tip Length (mm)
6.350mm
Product Attributes - Valve Material
Stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Valve Head Style
5 degree dish
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man12342-1
SFX Item ID 4931932
Supplier Item Code 4931932
Manufacturer SKU 12342-1
Manufacturer UPC 807298083636

Compatibility

Application Data
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock
  • Valve FitmentSearch by engine
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Valve Installed LengthStock

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