The Enginetech V1977NA exhaust valve features a 1.672" head diameter, 0.3708" stem (3/8" nominal), and 4.954" overall length with Stellite-faced sodium-filled severe-service construction. Fits 1980-1991 Ford 7.0L applications.
Important Notes
- Sold individually as a single valve. Order the quantity required for your engine configuration (typically one per cylinder per valve position).
- Chrome-plated stem provides a hard, low-friction wear surface for extended service life.
- Sodium-filled hollow stem with Stellite-faced seat: the sodium core transfers combustion heat from the valve head to the stem for cooler running temperatures, while the Stellite face resists wear under severe-service exhaust conditions. Handle with care - do not grind, cut, or heat the stem; dispose of damaged valves per hazmat guidance as sodium reacts with water.
- Carbureted applications only per OE catalog - not for fuel-injected variants of the listed engines.
- Always verify head diameter, stem diameter, overall valve length, and groove count against the OE valve being replaced before installation - valve dimensions vary across engine families and a visual match alone is not sufficient.
Specifications
| Part Number | V1977NA |
| Valve Type | Exhaust Valve |
| Head Diameter | 1.672" |
| Stem Diameter | 0.3708" (3/8" nominal) |
| Valve Length | 4.954" OAL |
| Material | Stellite-faced, sodium-filled stem (severe-service) |
| Stem Finish | Chrome Stem |
| Number of Grooves | 1 |
| Weight | 0.5 lbs |
| OEM Cross-Refs | Dana-Perfect Circle: 2112367, Dynagear-Manley: AC1977, Elgin: EC1977, Elgin: EC-1977, Fed. Mogul: V2137X, Fed. Mogul: V-2137X |
Vehicle Fitment
1980-1991 Ford 7.0L / 429 OHV V8 16V 4.360" Bore.
Product Video
Watch the Enginetech exhaust valve overview: https://youtu.be/G487Dw8HtII
Watch the Enginetech exhaust valve overview: https://youtu.be/eLaQHop7rH8
Enginetech standard valves are stock-replacement engine valves produced from OE grade materials or better, engineered with the production engine rebuilder in mind. Face runout, stem finish, and stem diameter tolerances are held to some of the tightest standards in the internal engine parts industry, and every valve is inspected by on-site engineers against a documented quality plan before it leaves the plant. The line covers domestic, import, and common high-performance applications across a full range of head diameters, stem diameters, and overall lengths, with chrome-plated and nitride-hardened stem finishes available where the engine's operating conditions call for the upgrade. Always verify head diameter, stem diameter, valve length, groove count, and any oversize stem requirement against the original valve being replaced before installing, as multiple valve configurations can share the same vehicle nameplate.
WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
