Cylinder Head Billet Half Moon Seal Black

Oil leaks? Not on our watch.

Fuji Racing’s billet half moon seals are the go-to solution for sealing off rocker covers on Subaru EJ engines—without relying on brittle, failure-prone plastic plugs.

CNC-machined from T6061 billet alloy, these seals are precision-fit replacements for the OEM rubber or plastic units that often fail after heat cycling or when changing rocker cover gaskets. If you're chasing long-term reliability and want a fix that holds under pressure, this is it.

💪 Billet T6061 alloy – Won’t crack, deform, or deteriorate
🧰 Direct replacement for OEM part numbers 11051AA070 / 11051AA040
🔁 Works with RCM2728, RCM2616, IAG-ENG-2000 equivalents
🛠 Fits all EJ20 & EJ25 Subaru engines
📦 Kit includes: 4x billet seals (enough for both heads)

If you’re unsure about compatibility, flick us your chassis number—we’ll confirm it for you.

Lock in your oil. Forget the mess. Run your EJ the way it was meant to.