Head Diameter: 2.080 in. - Stem Diameter: .3133 in. - O/A : 4.874
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.
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.
- Proven fatigue strength for extreme performance
- Chrome stems and hard tips enhance durability
- Exotic alloys for superior tensile strength, reliability, and longevity
- Swirl polishing and machined faces improved airflow/optimized efficiency
Information:
Manley Valve - Intake, Valve-LS1 P/F 2.080.| Attributes | |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Category Hierarchy | Valves>Severe Duty, Valves>Stainless Steel>Severe Duty |
| Country of Origin (Primary) | CN |
| Cylinder Head | LS-6 Cylinder Head, LS6 Cylinder Head |
| EBAY Category ID | 33621 |
| Emission Code | Off Road |
| Engine | LS-1, LS-2, LS1, LS2 |
| Engine - Web | LS-1, LS-2, LS |
| Engine Detail - Web | LS-1, LS-2, LS1, LS2 |
| Engine Family | LS, LS |
| Engine Type | ICE, ICE |
| Engine Valve Quantity | 8, 8 |
| Hazardous Material Code | N |
| Head Diameter | 2.080, 2.080 |
| Industry | Automotive, Automotive |
| Installed Height | Stock, Stock |
| Life Cycle Status Code | Available to Order |
| Make | Chevrolet, Chevrolet |
| Make - Web | Chevrolet, Chevrolet |
| Margin Width | 0.050, 0.050 |
| O/A Length | 4.874, 4.874 |
| Out of Stock Message | Call for Availability, Call for Availability |
| Product Market | Domestic, Domestic |
| Product Type | Engine Intake Valve Kit, Engine Intake Valve Kit |
| SDR Required Flag | N |
| Seat Width | 0.095, 0.095 |
| Stem Diameter | 0.3133, 0.3133 |
| Tip Length | 0.175, 0.175 |
| Title - Web | Manley Severe Duty? Series Chevy LS-1 Intake Valve Kit - 2.080 in. Head Dia., 4.874 in. O/A Length, 0.3133 in. Stem, Manley Severe Duty? Series Chevrolet LS1 Intake Valve Kit - 2.080 in. Head Dia., 4.874 in. O/A Length, 0.3133 in. Stem |
| Top of Head | 7 Degree Dish, 7 Degree Dish |
| Type | Intake |
| Underhead Angle | Pro Flo: 12.00, Pro Flo: 12.00 |
| Underhead Radius | 3/8, 3/8 |
| Valve Head Diameter | 2.080, 2.080 |
| Valve Head Shape | 7 Degree Dish, 7 Degree Dish |
| Valve Length | 4.874, 4.874 |
| Valve Material | Stainless Steel, Stainless Steel |
| Valve Quantity | 8, 8 |
| Valve Series | Severe Duty? Series, Severe Duty? Series |
| Valve Stem Diameter | 0.3133, 0.3133 |
| Valve Sub-Series | Pro Flo, Pro Flo |
| Valve Tip Length | 0.175, 0.175 |
| Valve Type | Intake, Intake |
| Warranty Time | 30 |
| Weight | 108, 108 |
| GTIN | 00807298051529 |