| I went to neil at Sigma and had the FIM chip and airbox modification, which is about six fiftypence size holes in the airbox, I am still running with standard pipes.
The airbox mod lets out a loverly Induction roar without offending the local plod too much.
It has smoothed out the bottom end and added about 6 extra horses, so Iam told, It does feel more responsive | 
Threaded Mode