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Manley Severe Duty Pro Flo Series Stainless Steel Valves 11504-1 Valve, Intake, Steel, 4.730 in. Length, 1.775 in. Diameter, 0.3415 in. Diameter Stem, Buick V6, Each

SKU: MAN11504-1

Valves

Manley Severe Duty Pro Flo Series Stainless Steel Valves 11504-1 Valve, Intake, Steel, 4.730 in. Length, 1.775 in. Diameter, 0.3415 in. Diameter Stem, Buick V6, Each

SKU: MAN11504-1

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 Pro Flo Series intake and exhaust 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 fully machined and swirl polished, and offer improved flow with undercut "Pro Flo" stems. Many size options are available, for applications from 1955 and up.

Part Type

Valves

Data: v4.2 - Upd: 2026-10-14 10:04:35

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11504-1
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Pro Flo Series Stainless Steel Valves
Product Attributes - UPC
807298049113
Product Attributes - Valve Position
Intake
Product Attributes - Intake Valve Head Diameter (in.)
1.775 in.
Product Attributes - Intake Valve Head Diameter (mm)
45.085mm
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.)
4.730 in.
Product Attributes - Intake Overall Valve Length (mm)
120.142mm
Product Attributes - Undercut Stem
Yes
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
NK-844 stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
97
Product Attributes - Valve Head Style
7 degree dish
Product Attributes - Valve Seat Width (in.)
0.080 in.
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11504-1
SFX Item ID 4933551
Supplier Item Code 4933551
Manufacturer SKU 11504-1
Manufacturer UPC 807298049113
Alternative References V6

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeBUICK
    Beginning Year1975
    Ending Year2009
    Engine TypeV6
    Engine Size3.8L/231
    Engine FamilyGM V6 GAS
    Valve Installed LengthStock

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