one of our trucks does that really bad. its easy to do but not good on that turbo. ours is a 00 24v straight piped k&n cold air. and you got to have some way of fueling it so the boost comes up higher than normal via just about any chip or programer out there. Ive noticed also the surge gets louder with smaller exhaust. we had a set of 6" stacks on ours and could still hear it just not as high of pitch.
but like i said stock hx35s were not designed for high boost levels.