i have a problem with my sr20det s14.....i just got my 3' cat back exhaust and i took the car out for a test run....not boosting high or reving or even speeding...just a normal drive.....everything was going good so i kept driving around...well about 10miles later i hear a rattle....i pull over and the exhaust starts smoking white smoke....after about 2-3 mins(of just sitting in the parking lot) i turn off the car...i dont have a turbo timer and this was the first time i ran the car....i let it cool down and i turned it back on and the rattling sounds like its coming from the turbo....i took the piping off and i didn't feel as much air coming from the turbo as normal.....so the rattling continues but it stops smoking....any ideas ??