More out of intrest, the downpipe on my is as far as i know is the one it came with when it was imported.Would it be 3" (all of the downpipe )as the rest of the system is??
And if i wanted to just change the back box would i have to buy a 3" one???

 

What car/year/model??
I will tell you that no, it wont be 3 inches.

Tony

 

wrx 98 wagon

 

bumpp!!