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Manley Severe Duty Series Stainless Steel Valves 11503-1 Valve, Exhaust, Steel, 4.725 in. Length, 1.500 in. Diameter, 0.3415 in. Diameter Stem, Buick V6, Each

SKU: MAN11503-1

Valves

Manley Severe Duty Series Stainless Steel Valves 11503-1 Valve, Exhaust, Steel, 4.725 in. Length, 1.500 in. Diameter, 0.3415 in. Diameter Stem, Buick V6, Each

SKU: MAN11503-1

Valves
A$85.03
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 10:06:18

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11503-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Series Stainless Steel Valves
Product Attributes - UPC
807298049090
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.500 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
38.100mm
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.)
4.725 in.
Product Attributes - Exhaust Overall Valve Length (mm)
120.015mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.270 in.
Product Attributes - Valve Tip Length (mm)
6.858mm
Product Attributes - Valve Material
Stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
98
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11503-1
SFX Item ID 4932700
Supplier Item Code 4932700
Manufacturer SKU 11503-1
Manufacturer UPC 807298049090
Alternative References V6

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year1975
    Ending Year1981
    Engine TypeV6
    Engine Size3.8L/231
    Engine FamilyGM V6 GAS
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year1978
    Ending Year1979
    Engine TypeV6
    Engine Size3.2L/196
    Engine FamilyGM V6 GAS
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year1984
    Ending Year1988
    Engine TypeV6
    Engine Size3.8L/231
    Engine FamilyGM V6 GAS
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year1994
    Ending Year2003
    Engine TypeV6
    Engine Size3.1L/189
    Engine FamilyGM V6 GAS
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year2005
    Ending Year2007
    Engine TypeV6
    Engine Size3.8L/231
    Engine FamilyGM V6 GAS
    Cylinder Head TypeStock configuration

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