stock exhaust

i was told that the sti's have a 3" stock exhaust while the wrx's have 2.5"? is this right. also if i put a stock sti exhaust on my wrx will i be able to hear a little rumble?

 

i think wrx have 2.25... and stis 2.5?

 

hmm, i dont think you could hear a whoel difference, but yea i think the sti is 2.5
wrx is 2.5 if im correct

 

STi is 2.5. WRX is 2.25 in the muffler section.

 

If you put an STi muffler on it will sound a little better.

 

And perform better.