Any body have this problem ?? When under load and pulling around 16psi boost sometimes the waste gate starts to flutter making a high pitched squealing sound, the boost gauge needle flutters at the same time.The particular truck is running a 3.5" down pipe with a 4" Banks Exhaust and a DP 4 stage chip,the noise gets worse the higher you go with the programming /ubbthreads/images/graemlins/shrug.gif /ubbthreads/images/graemlins/shrug.gif