Hi, I've got a golf mk4 GT tdi, I have remapped it and done a straight pipe through out, with the 'cat' removed as well. I'm getting the rough noise I wanted but every time I shift the gear or let go of the accelerator there's this loud owl noise coming through, I just wanted to know is there a way of getting rid of the owl noise it self?? some has suggested to put a muffler in the mid box, can someone help me out. cheers