Supertech Inconel exhaust valves for EJ20/EJ25 Subaru WRX and STi. The Inconel 751 nickel base alloy is great for engines that reach high temps. These valves are available in various sizes to match your head diameter. The sodium-filled option is designed to withstand even higher temperatures. Sold as a set of 8 or individually as needed. Please do all your research and consult your engine builder if necessary!
Vehicle Fitment:
2002-2014 Subaru WRX
2004-2021 Subaru STi
• For exhaust valves only.
| Fitment: | Size: | Includes: | Part Number: |
| Exhaust | +1mm Oversize 33.00mm • Stem Diameter 5.96mm • Length 104.7mm (std) |
8 Valves | SEVI-1014-8 |
| 1 Valve | SEVI-1014-1 | ||
| Exhaust *Sodium-Filled* |
Standard 32.00mm • Stem Diameter 5.95mm • Length 104.7mm |
8 Valves | SEVI-1010-HS-8 |
| 1 Valve | SEVI-1010-HS-1 | ||
| Exhaust *Sodium-Filled* |
+1mm Oversize 33.00mm • Stem Diameter 5.95mm • Length 104.7mm |
8 Valves | SEVI-1014-HS-8 |
| 1 Valve | SEVI-1014-HS-1 | ||
| Exhaust | +1mm Oversize 33.00mm • Stem Diameter 5.96mm • Length 104.20mm (short) |
*Discontinued* | SEVI-1014/2 |
| Exhaust | +.5mm Oversize 32.50mm • Stem Diameter 5.96mm • Length 104.2mm (short) |
*Discontinued* | SEVI-1012/2 |
Inconel Features:
The Inconel 751 Nickel Base Alloy material is used for exhaust valves in engines that reach very high temperatures and its use is growing with the application of turbos and superchargers.
Images are for reference.
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