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Manley Severe Duty Series Stainless Steel Valves 11591-1 Valve, Exhaust, Duty, Steel, 1.880 in. Diameter, 0.342 in. Stem, 5.655 in. Length, Each

SKU: MAN11591-1

Valves

Manley Severe Duty Series Stainless Steel Valves 11591-1 Valve, Exhaust, Duty, Steel, 1.880 in. Diameter, 0.342 in. Stem, 5.655 in. Length, Each

SKU: MAN11591-1

Valves
A$71.27
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 17:10:12

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11591-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Series Stainless Steel Valves
Product Attributes - UPC
807298050836
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.880 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
47.752mm
Product Attributes - Exhaust Valve Stem Diameter (in.)
0.342 in.
Product Attributes - Exhaust Valve Stem Diameter (mm)
8.67mm
Product Attributes - Exhaust Overall Valve Length (in.)
5.655 in.
Product Attributes - Exhaust Overall Valve Length (mm)
143.637mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.260 in.
Product Attributes - Valve Tip Length (mm)
6.604mm
Product Attributes - Valve Material
XH-426 stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
129
Product Attributes - Valve Head Style
20 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 man11591-1
SFX Item ID 4930885
Supplier Item Code 4930885
Manufacturer SKU 11591-1
Manufacturer UPC 807298050836

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeFORD
    Beginning Year1968
    Ending Year1973
    Engine TypeV8
    Engine Size7.0L/429
    Engine FamilyFord big block 385 Series
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeFORD
    Beginning Year1972
    Ending Year1997
    Engine TypeV8
    Engine Size7.5L/460
    Engine FamilyFord big block 385 Series
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration

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