The Enginetech V4371S exhaust valve features a 1.551" head diameter, 0.3127" stem (8mm nominal), and 4.930" overall length with Stellite-faced severe-service construction. Fits 1997-2016 GM/Chevrolet/Hummer/Isuzu 4.8L/5.3L/5.7L/6.0L applications.
Important Notes
- Sold individually as a single valve. Order the quantity required for your engine configuration (typically one per cylinder per valve position).
- Fits gasoline applications only on the listed engines; confirm against VIN/fuel type for CNG or Bi-fuel variants.
- Also covers LPG (propane) variants of the listed engines per OE catalog; verify fuel type before ordering.
- Chrome-plated stem provides a hard, low-friction wear surface for extended service life.
- Stellite-faced construction is designed for severe-service exhaust temperatures and extended duty cycles typical of heavy-load or high-RPM operation.
- 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 | V4371S |
| Valve Type | Exhaust Valve |
| Head Diameter | 1.551" |
| Stem Diameter | 0.3127" (8mm nominal) |
| Valve Length | 4.930" OAL |
| Material | Stellite faced (severe-service) |
| Stem Finish | Chrome Stem |
| Number of Grooves | 1 |
| Weight | 0.25 lbs |
| OEM Cross-Refs | General Motors: 12558295, SBI: 01935S |
Vehicle Fitment
- 2005-2009 GM 5.3L / 325 OHV V8 16V "C" GM 3.780" Bore
- 1997-2004 GM 5.7L / 346 OHV V8 16V LS Series "G,S" Chev. 99.00mm Bore
- 2005-2007 GM 6.0L / 364 OHV V8 16V LS Series Vortec GM 4.000" Bore
- 1999-2016 GM/Chevrolet 4.8L / 293 OHV V8 16V GM 3.780" Bore
- 2000-2014 GM/Chevrolet 5.3L / 325 OHV V8 16V LS Series Vortec GM 3.780" Bore
- 1999-2007 GM/Chevrolet 6.0L / 364 OHV V8 16V LS Series Vortec GM 4.000" Bore
- 2003-2007 Hummer 6.0L / 364 OHV V8 "U" GM 4.000" Bore
- 2003-2006 Isuzu 5.3L / 5328 OHV V8 16V "P,M" GM 96.00mm Bore
- 2003-2008 Isuzu 6.0L / 5967 OHV V8 16V "G,N,U" Vortec GM 101.60mm Bore
- 2008-2009 Saab 6.0L / 5967 OHV V8 16V "H" GM 101.6mm 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.
