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 Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)
Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)
A$580.25
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.
We accept
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
- 11854-8
- Product Attributes - Part Type
- Valves
- Product Attributes - Product Line
- Manley Severe Duty Series Stainless Steel Valves
- Product Attributes - UPC
- 807298054094
- Product Attributes - Valve Position
- Intake
- Product Attributes - Intake Valve Head Diameter (in.)
- 2.300 in.
- Product Attributes - Intake Valve Head Diameter (mm)
- 58.420mm
- Product Attributes - Intake Valve Stem Diameter (in.)
- 0.341 in.
- Product Attributes - Intake Valve Stem Diameter (mm)
- 8.66mm
- Product Attributes - Intake Overall Valve Length (in.)
- 5.494 in.
- Product Attributes - Intake Overall Valve Length (mm)
- 139.548mm
- Product Attributes - Undercut Stem
- No
- Product Attributes - Swirl-Polished
- Yes
- Product Attributes - Valve Tip Length (in.)
- 0.250 in.
- Product Attributes - Valve Tip Length (mm)
- 6.350mm
- Product Attributes - Valve Material
- NK-844 stainless steel
- Product Attributes - Lock Groove Quantity
- 1-groove
- Product Attributes - Lock Groove Style
- Conventional
- Product Attributes - Approximate Weight (g)
- 148
- 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 | man11854-8 |
| SFX Item ID | 4060939 |
| Supplier Item Code | 4060939 |
| Manufacturer SKU | 11854-8 |
| Manufacturer UPC | 807298054094 |
| Alternative References | 11/32in |
Compatibility
| Application Data |
|
|---|
Loading compatibility information...
Keep shopping
More from Manley Performance
Manley Performance
Manley Chevrolet LS / LT1 .025in Longer 6.125in STD WEI Pro Series I Beam Connecting Rod - Single
man14559R6-1
A$662.07
Manley Performance
Manley Honda/Acura (K24) Turbo Tuff Pro Series I Beam Connecting Rod Set
man14405-4
A$2,123.22
Manley Performance
Manley Nissan (SR20DE/DET) 86.5mm +.5mm Oversized Bore 9.0:1 Dish Piston Set with Ring
man638005C-4
A$1,422.87
