i have these CT 12's that i bought but am now not gonna use, so they are for sale there is a pic of them on my members rides thread, Steves AE 86 page 1
still in very good condition with dump pipe and oil and water fittings $500 or nearest offer.
all i know about them is that they came off an 88 soarer twin turbo. each housing has "CT12 C 2" embossed on it. the may be rebuilt due to the very small amount of bearing play in them, 0.5 mm at a guess.