Do you mean it sounds like a growl when you shift? Yeah mine does that all the time, sounds great...and by the way, here are various sound clips of my scoobies many sound stages....
http://members.aol.com/specopsrb6/nomufflerscoob.wav http://members.aol.com/specopsrb6/127dbscooby.wav http://members.aol.com/specopsrb6/scoobyblitz.wav http://members.aol.com/specopsrb6/borlablitz.wav http://members.aol.com/specopsrb6/noheadersscooby.wav
Those are in the following order: no muffler, 2.25" straight pipe (hit 127.4db from 20" away), Blitz NurSpec with 2.25 midpipe (same as Keiho), the borla headers plus the blitz, and finally NO HEADERS!
Hope ya like em even though they are poor quality and the real deal sounds 10x better.