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Manley Chevy LS-3/L-99 (L-92 Head) Small Block Race Master Exhaust Valves (Set of 8)

SKU: MAN11621-8

Valves

MAN Race Master Valves

Manley Chevy LS-3/L-99 (L-92 Head) Small Block Race Master Exhaust Valves (Set of 8)

SKU: MAN11621-8

Valves

MAN Race Master Valves

A$412.55
IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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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 Exhaust Valve

Data: v4.2 - Upd: 2026-10-11 13:49:54

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
11621-8
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Race Series Stainless Steel Valves
Product Attributes - UPC
807298051192
Product Attributes - Valve Position
Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.)
1.590 in.
Product Attributes - Exhaust Valve Head Diameter (mm)
40.386mm
Product Attributes - Exhaust Valve Stem Diameter (in.)
0.314 in.
Product Attributes - Exhaust Valve Stem Diameter (mm)
7.97mm
Product Attributes - Exhaust Overall Valve Length (in.)
4.923 in.
Product Attributes - Exhaust Overall Valve Length (mm)
125.044mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.160 in.
Product Attributes - Valve Tip Length (mm)
4.064mm
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)
93
Product Attributes - Valve Head Style
18 degree dish
Product Attributes - Valve Seat Width (in.)
0.115 in.
Product Attributes - Quantity
Sold as a set of 8.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man11621-8
SFX Item ID 4060457
Supplier Item Code 4060457
Manufacturer SKU 11621-8
Manufacturer UPC 807298051192
Alternative References LS-3/L-99, (L-92

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine Size6.2L/376
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Valve Installed LengthStock
    Cylinder Head Style (application)L92
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year2010
    Ending Year2017
    Engine TypeV8
    Engine Size6.2L/376
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Valve Installed LengthStock
    Cylinder Head Style (application)L92

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