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Manley Race Series Stainless Steel Valves 11312-8 Valves, Intake, Steel, 2.250 in. Diameter, .372 in. Stem, 5.105 in. Length, Chevy, Set of 8

SKU: MAN11312-8

Valves

Manley Race Series Stainless Steel Valves 11312-8 Valves, Intake, Steel, 2.250 in. Diameter, .372 in. Stem, 5.105 in. Length, Chevy, Set of 8

SKU: MAN11312-8

Valves
A$384.44
Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.
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Description

Manley Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM.

Part Type

Engine Intake Valve

Data: v4.2 - Upd: 2026-10-14 10:11:06

Features

  • Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.
  • Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.
  • Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.
  • Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.
  • Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11312-8
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Race Series Stainless Steel Valves
Product Attributes - UPC
807298050300
Product Attributes - Valve Position
Intake
Product Attributes - Intake Valve Head Diameter (in.)
2.250 in.
Product Attributes - Intake Valve Head Diameter (mm)
57.200mm
Product Attributes - Intake Valve Stem Diameter (in.)
0.372 in.
Product Attributes - Intake Valve Stem Diameter (mm)
9.50mm
Product Attributes - Intake Overall Valve Length (in.)
5.105 in.
Product Attributes - Intake Overall Valve Length (mm)
129.667mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.225 in.
Product Attributes - Valve Tip Length (mm)
5.720mm
Product Attributes - Valve Material
NK-842 stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Conventional
Product Attributes - Approximate Weight (g)
141
Product Attributes - Valve Head Style
7 degree dish
Product Attributes - Valve Seat Width (in.)
0.080 in.
Product Attributes - Quantity
Sold as a set of 8.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11312-8
SFX Item ID 4928668
Supplier Item Code 4928668
Manufacturer SKU 11312-8
Manufacturer UPC 807298050300

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1961
    Ending Year1965
    Engine TypeV8
    Engine Size6.7L/409
    Engine FamilyChevy big block W-engines
    Valve Installed LengthStock
    Cylinder Head TypeStock configuration

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