Manley Performance
Manley Ford XR6 4.0L Barra 240T Piston - 3.633 in. Bore 1.215 in. CH -10.00 CC
man628100C-1
A$493.35
Manley Chevy LS-6 Head Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Chevy LS-6 Head Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
A$592.83
LAST ONE! Est Ship 4-7 days.
LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.
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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 Exhaust 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
- 11677-8
- Product Attributes - Part Type
- Valves
- Product Attributes - Product Line
- Manley Severe Duty Series Stainless Steel Valves
- Product Attributes - UPC
- 807298062792
- Product Attributes - Valve Position
- Exhaust
- Product Attributes - Exhaust Valve Head Diameter (in.)
- 1.600 in.
- Product Attributes - Exhaust Valve Head Diameter (mm)
- 40.640mm
- Product Attributes - Exhaust Valve Stem Diameter (in.)
- 0.314 in.
- Product Attributes - Exhaust Valve Stem Diameter (mm)
- 7.96mm
- Product Attributes - Exhaust Overall Valve Length (in.)
- 4.923 in.
- Product Attributes - Exhaust Overall Valve Length (mm)
- 125.044mm
- Product Attributes - Undercut Stem
- Yes
- Product Attributes - Swirl-Polished
- Yes
- Product Attributes - Valve Tip Length (in.)
- 0.175 in.
- Product Attributes - Valve Tip Length (mm)
- 4.445mm
- 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)
- 92
- 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 | man11677-8 |
| SFX Item ID | 4060437 |
| Supplier Item Code | 4060437 |
| Manufacturer SKU | 11677-8 |
| Manufacturer UPC | 807298062792 |
| Alternative References | LS-6 |
Compatibility
| Application Data |
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|---|
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