how come with some valves when you back off the throttle you still get the airfilter noise first then the dump.. mines got a gt30 and with the old baily valve it goes off all the time and makes a right noise but no filter noise first.. put the ggr one on and the valve hardly ever goes off unless lots of boost but lots of filter fluttery noise .. now have a tial one on their and when backing off it makes the filter noise for a split second then the valve makes a little dump..