Im not sure how to describe this noise but kinda sounds like air pressure being released (maybe a eighth of a second) when the engine is running. its really quick and the frequency increases as the rpm increases. kinda like maybe there's a leak somewhere. I dont have headers, all I have is an intake. my stock exhaust is black as it can get. I got a tune up not too long ago after it was having problems (low power and surging while accelerating) . Somethings gotta be wrong with the car cause its fast as **** and I havn't done anything to it. Not saying its bad but its definitly not normal. No engine mods, just a intake. Yesterday I beat a 351ci f-150 by quite a distance. I kept up with my friends new Jetta 1.8T. Im guessing my 0-60 is around 8, 8.5 seconds. Now this may seem nice and cool... yeah lucky me. But I dont want the engine to blow up on me and that sound is making me crazy that the engine might blow.

Info on my car...
97 DX Auto
17 inch lightweight rims
Short ram intake