I have an 07 STi and I had GST Motorsports install a KartBoy SS w/ front and rear bushings about a year and a half ago. Since the install I put on about 12k miles on the car and now when I go over small bumps there seems to be some kind of creaking noise coming out from where the shifter is located. Also when I come to a complete stop the shifter makes another creaking noise from the same area. Any idea what the problem can be or even how it can be fixed?

Thank You!