906 exhaust studs

[Shadrack]

Does anyone know which exhaust studs on 906 heads have water jackets behind them? Haven’t ran in a while but did have some wet studs in the past and want to properly seal this time! Thanks

 

[RemCharger]

Most, if not all. Just depends on the casting to which ones did or didn't punch through.

 

[PRHeads]

All are wet on 906’s