I was racing a mustang on my way home from the gym and smoked'em. I got to the next light and when I started to take off I thought I heard a siren.... I looked around and didn't see anything, then I realized it was my car making the sound. I drove it home and looked under the hood. When I rev the engine up to about 2gs it makes a siren sound. It seems to be coming from the rear turbo. If I place my hand on the IC Pipe coming up from the rear turbo while I rev the engine I can feel it vibrate in almost synchronicity with the siren noise. Did I blow a turbo? I'm freaken hot right now. I just spent almost $1100 on the SBC, Power Meter, and Stillen. Now I have to f_cKen buy fu_ken turbos. Someone please sympathize with me here, how can I be sure? Can I drive it to work if I don't boost?