Genuine OEM Mitsubishi spark plug well seal (suit EVO IV to VIII).
Leaks from the valve cover gaskets/seals need to be addressed as it can cause damage to other engine components (belts, hoses etc.) or even cause engine misfires, from oil leaking into the spark plug tubes.
| Vehicle Applications |
| Manufacturer | Make | Model | Engine |
| Mitsubishi | Evolution IV | CN9A | 4G63T |
| Mitsubishi | Evolution V | CP9A | 4G63T |
| Mitsubishi | Evolution VI | CP9A | 4G63T |
| Mitsubishi | Evolution VII | CT9A | 4G63T |
| Mitsubishi | Evolution VIII | CT9A | 4G63T |