Bad castings lead to bad housings (poor products).
Rubbish compressor housings will have no chanceALWAYS REJECTED, throw away.
Every month, Okamins turbos rejects some Qtys of housing castings, as the casting yield rate is not perfectly 100%, and most importantly the defects are always found after machining, which are not outside or in the sufrace of products.
IS38 06K145722H turbocharger compressor housing
Compressor housing K04-0064, 53049880064, 53049700064
Compressor housing Subaru RHF55 VF39