Its a 2002 WRX with an HKS downpipe and an ATR exhaust.I bought the car from my friend and know that these peices fit together because he had them on the car before I took them off to pass emissions. ONly problem is we cant remember whether we used the stock bolts or if there was another set to connect the DP to the exhaust. The factory bolts seem to be to short, so the springs canont be compressed enough to start threading the bolt. I am sure I am overlooking something really simple. If andy can shed some light that woudl be awesome. Thanks