did all classic sti's have water spray on the intercooler as mine hasnt and i have been told they all did also they all had electronic diff control which mine hasnt.

 

No they didn't get DCCD or IC Sprays. Type R and the various versions thereof had it.

 

Pretty certain that not all classic STis had these - think its only the type r and type ra STis that had them.
dnc

 

good i was starting to worry abit. i check the vin plate and it all looked good but my boss who used to work at a subaru garage and now of course know everything in the whole world about them was trying to tell me the all had them, so something is not right with mine

 

Not sure about the intercooler spray thing TBH but the DCDD definately did not come with every model regardless of it being an STI or not. What model do you have anyway?
Some more info here; Which Car is a WRX STi and here; Scoobypedia | Trusted knowledge for everything Subaru | Scoobypedia / Scoobypedia

 

its a GC8D4ED according to the vin

 

Hi your chassis number version 3sti could be v-limited did not have dccd or waterspray.Hope this helps