Well I was coming back from Indy on I-70 and a C5 blew by me. I ended up chasing him for a little while and switched into the opposite lane and got a look at the driver. He flashed me a smile and then gunned it. So of course I gunned it, but by the way he wasted my ass you would have thought I slammed on the brakes. I've taken on 3 C5's from a dead stop and ate all three off the line but I've never raced one past 100 before. I figured they just had way better top end the way he killed me. Well I ended up getting off at my exit and so did he. He pulled in to the Flying J to gas up and I figured I'd chit chat with him quick like. Well it turns out that he beat my ass for a reason.... It was twin turbo along with some serious internal work. Just looking at the engine gave me a woody.......lmfao.... He said it was pushing around 690hp I don't feel so bad after all. Oh and I kept getting this weird ass sound when I was racing him. I was in 4th and when I hit about 14psi I heard this really loud ass whistle. I realized it was coming from my rear speakers. Has this happened to anyone else?