impreza stainless exhaust ?

subaru impreza backbox came off my 2003 sti, will fit other models this is a good quality stainless steel exhaust and not a cheap ebay one. ive been told its a hks hi-power but i cant be 100% it was on my car when i bought it. no scrapes or dents but it is used so not 100% perfect (not far away) its a 3" bore with a 4.5" tailpipe i can deliver for fuel costs or meet somewhere close.