theses turbo houseings that u guys talk bout like 12 cm 16 and 21cm what part is measured when u say 12cm houseing is it inlet into turbo is it the thickness of the houseing what is it so that way i can look at turbo measure it and say oh its an .........
thanks

 

The brownish rusty lookin part of the turbo that is hooked to the exhaust manifold. im pretty sure thats the housing. its stamped on the back of it what size it is. 91.5 and 92 was 21cm and 89,90, and 93 were all 18.5. thats what we believe. Brandon

 

The number that is stamped on the housing is how many cubic centimeters of volume there is in the exhaust housing. If I'm wrong someone will let us know.

 

Can't argue with the right answer.

 

woohoo! I knew If I read enough stuff on hear I'd actually learn something.