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Manley Severe Duty Series Stainless Steel Valves 11745-1 Valve, Exhaust, Steel, 1.900 in. Diameter, .342 in. Stem, 5.422 in. Length, Set of 8

SKU: MAN11745-1

Valves

Manley Severe Duty Series Stainless Steel Valves 11745-1 Valve, Exhaust, Steel, 1.900 in. Diameter, .342 in. Stem, 5.422 in. Length, Set of 8

SKU: MAN11745-1

Valves
A$161.01
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 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 10:06:18

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11745-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Series Stainless Steel Valves
Product Attributes - UPC
807298055367
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.900 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
48.260mm
Product Attributes - Exhaust Valve Stem Diameter (in.)
0.342 in.
Product Attributes - Exhaust Valve Stem Diameter (mm)
8.69mm
Product Attributes - Exhaust Overall Valve Length (in.)
5.422 in.
Product Attributes - Exhaust Overall Valve Length (mm)
137.719mm
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
XH-432 Xtreme alloy
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
136
Product Attributes - Valve Head Style
9 degree dish
Product Attributes - Valve Seat Width (in.)
0.085 in.
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Underhead angle/radius 15 x .500 in. Margin 0.075 in. Also designed to work in marine applications.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11745-1
SFX Item ID 4932822
Supplier Item Code 4932822
Manufacturer SKU 11745-1
Manufacturer UPC 807298055367

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1965
    Ending Year1970
    Engine Size6.5L/396
    Engine FamilyChevy big block Mark IV
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1966
    Ending Year1969
    Engine Size7.0L/427
    Engine FamilyChevy big block Mark IV
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1970
    Ending Year1972
    Engine Size6.6L/402
    Engine FamilyChevy big block Mark IV
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1991
    Ending Year1995
    Engine Size7.4L/454
    Engine FamilyChevy big block Gen V
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1996
    Ending Year2000
    Engine Size7.4L/454
    Engine FamilyChevy big block Gen VI
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration

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