probly a dumb question but i dont know so ill ask, are all the intake manifolds the same like the ecotec and the 16 v DOHC or watever bcuz i came across a 16v one at the local junkyard and was thinking of getting it but if it aint gunna fit then forget it. thanks
 
Are you talking about the 2.4 Quad 4 when you say 16v DOHC? 
 
 
A DOHC 4 cylinder is almost always a 16 valve engine (i.e. 16V DOHC).  Like Brian said, I'm assuming you mean 2.4L LD9, and the answer is no.
  
  
I have no signiture
 
yea that's wat I meant thank you