Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Manley Severe Duty Series Stainless Steel Valves 11234-8 Valves, Intake, Steel, 2.055 in. Diameter, .311 in. Stem, 5.010 in. Length, Chevy, Set of 8

SKU: MAN11234-8

Valves

Manley Severe Duty Series Stainless Steel Valves 11234-8 Valves, Intake, Steel, 2.055 in. Diameter, .311 in. Stem, 5.010 in. Length, Chevy, Set of 8

SKU: MAN11234-8

Valves
A$600.79
IN STOCK! Est Ship 4-7 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.
View cart 0
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400°F, Manley exhaust valves endured 100 million cycles, while competitors failed after just 100,000, proving a 1,000× longer fatigue life. Each valve features chrome stems, hard tips, and swirl-polished underheads with fully machined combustion faces for superior airflow, efficiency, and wear resistance. Built for those who demand race-winning strength and precision, Manley Severe Duty® Valves set the industry standard for performance and endurance.

Part Type

Engine Intake Valve

Data: v4.2 - Upd: 2026-10-23 20:07:47

Features

  • Chrome stems and hard tips enhance durability
  • Exotic alloys for superior tensile strength, reliability, and longevity
  • Proven fatigue strength for extreme performance
  • Swirl polishing and machined faces improved airflow/optimized efficiency

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
11234-8
Product Attributes - Part Type
Valves
Product Attributes - Product Line
Manley Severe Duty Series Stainless Steel Valves
Product Attributes - UPC
807298048055
Product Attributes - Valve Position
Intake
Product Attributes - Intake Valve Head Diameter (in.)
2.055 in.
Product Attributes - Intake Valve Head Diameter (mm)
52.197mm
Product Attributes - Intake Valve Stem Diameter (in.)
0.311 in.
Product Attributes - Intake Valve Stem Diameter (mm)
7.90mm
Product Attributes - Intake Overall Valve Length (in.)
5.010 in.
Product Attributes - Intake Overall Valve Length (mm)
127.254mm
Product Attributes - Undercut Stem
No
Product Attributes - Swirl-Polished
Yes
Product Attributes - Valve Tip Length (in.)
0.290 in.
Product Attributes - Valve Tip Length (mm)
7.366mm
Product Attributes - Valve Material
NK-844 stainless steel
Product Attributes - Lock Groove Quantity
1-groove
Product Attributes - Lock Groove Style
Beadlock
Product Attributes - Approximate Weight (g)
110
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 man11234-8
SFX Item ID 4933565
Supplier Item Code 4933565
Manufacturer SKU 11234-8
Manufacturer UPC 807298048055

Compatibility

Application Data
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1962
    Ending Year1969
    Engine TypeV8
    Engine Size5.4L/327
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1967
    Ending Year1969
    Engine TypeV8
    Engine Size4.9L/302
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1967
    Ending Year2002
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1968
    Ending Year1973
    Engine TypeV8
    Engine Size5.0L/307
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1970
    Ending Year1980
    Engine TypeV8
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration
  • Valve FitmentSearch by engine
    MakeCHEVROLET
    Beginning Year1976
    Ending Year2002
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Valve Installed Length0.100 in. over
    Cylinder Head TypeStock configuration

Loading compatibility information...

Keep shopping

More from Manley Performance