Manley Performance
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Manley Chevy L83 5.3L 1.930in Head Diameter Pro Flo/Severe Duty Intake Valves (Set of 8)
Manley Chevy L83 5.3L 1.930in Head Diameter Pro Flo/Severe Duty Intake Valves (Set of 8)
A$616.41
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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
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
- 12358-8
- Product Attributes - Part Type
- Valves
- Product Attributes - Product Line
- Manley Severe Duty Pro Flo Series Stainless Steel Valves
- Product Attributes - UPC
- 00807298109930
- Product Attributes - Valve Position
- Intake
- Product Attributes - Intake Valve Head Diameter (in.)
- 1.930 in.
- Product Attributes - Intake Valve Head Diameter (mm)
- 49.022mm
- Product Attributes - Intake Valve Stem Diameter (in.)
- 0.313 in.
- Product Attributes - Intake Valve Stem Diameter (mm)
- 7.95mm
- Product Attributes - Intake Overall Valve Length (in.)
- 5.232 in.
- Product Attributes - Intake Overall Valve Length (mm)
- 132.893mm
- Product Attributes - Undercut Stem
- Yes
- 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
- NK-842 stainless steel
- Product Attributes - Lock Groove Quantity
- 1-groove
- Product Attributes - Lock Groove Style
- Conventional
- Product Attributes - Approximate Weight (g)
- 113
- Product Attributes - Valve Head Style
- 7 degree dish
- Product Attributes - Valve Seat Width (in.)
- 0.100 in.
- Product Attributes - Quantity
- Sold as a set of 8.
- Product Attributes - Notes
- Valves have a back cut of 0.50 in. x 30 degree.
Reference Information
| Brand Name/s | Manley Performance |
|---|---|
| StreetFX SKU | man12358-8 |
| SFX Item ID | 4060047 |
| Supplier Item Code | 4060047 |
| Manufacturer SKU | 12358-8 |
| Manufacturer UPC | 807298109930 |
| Alternative References | L83, 5.3L, 1.930in |
Compatibility
| Application Data |
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|---|
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