Manley Valve - Exhaust, Valve-BBC PONT S/D 1.900
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 - Exhaust, Valve-BBC PONT S/D 1.900.| 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 | Pontiac Pro Stock, Dart Big Chief, Pontiac Pro Stock, Dart Big Chief |
| EBAY Category ID | 33621 |
| Emission Code | Off Road |
| Engine | Big Block, Big Block |
| Engine - Web | Big Block, Big Block |
| Engine Detail - Web | Big Block, Big Block |
| Engine Family | Big Block, Big Block |
| Engine Type | ICE, ICE |
| Engine Valve Quantity | 1, 1 |
| Hazardous Material Code | N |
| Head Diameter | 1.900, 1.900 |
| Industry | Automotive, Automotive |
| Life Cycle Status Code | Available to Order |
| Make | Chevrolet, Chevrolet |
| Make - Web | Chevrolet, Chevrolet |
| Margin Width | 0.085, 0.085 |
| O/A Length | 6.38, 6.380 |
| Out of Stock Message | Call for Availability, Call for Availability |
| Product Market | Domestic, Domestic |
| Product Type | Engine Exhaust Valve, Engine Exhaust Valve |
| SDR Required Flag | N |
| Seat Width | 0.100, 0.100 |
| Stem Diameter | 0.3415, 0.3415 |
| Tip Length | 0.250, 0.250 |
| Title - Web | Manley Severe Duty? Series Chevy Big Block Exhaust Valve - 1.900 in. Head Dia., 6.380 in. O/A Length, 0.3415 in. Stem, Manley Severe Duty? Series Chevrolet Big Block Exhaust Valve - 1.900 in. Head Dia., 6.380 in. O/A Length, 0.3415 in. Stem |
| Top of Head | 20 Degree Dish, 20 Degree Dish |
| Type | Exhaust |
| Underhead Angle | 25.00, 25.00 |
| Underhead Radius | 3/8, 3/8 |
| Valve Head Diameter | 1.900, 1.900 |
| Valve Head Shape | 20 Degree Dish, 20 Degree Dish |
| Valve Length | 6.380, 6.380 |
| Valve Material | Stainless Steel, Stainless Steel |
| Valve Quantity | 1, 1 |
| Valve Series | Severe Duty? Series, Severe Duty? Series |
| Valve Stem Diameter | 0.3415, 0.3415 |
| Valve Tip Length | 0.250, 0.250 |
| Valve Type | Exhaust, Exhaust |
| Warranty Time | 30 |
| GTIN | 00807298050607 |