Thanks zee28 and papi! that worked great! was considering replacing the DISA and ICV itself after reading some posts and they still have the same issue after replacement(was thinking i might get lucky). But when i looked at the hose, low and behold, 3 cracks that you can literally see thru. Replaced a $25 part and now i can enjoy my afternoon ride without any annoying whistling sound. I had the exact problem as 'gollum'