Thanks(thebbbusa @ Apr. 24 2007,10:40) Loads of data and info on this topic here on the board. Just do a quick search on extensions.
FWIW minimum extension is about 3.5 - 4 inches for bolt on extensions.
Prices and what you have please.(Gixx1300R @ Apr. 24 2007,23:00) these are my Extensions. I make them and I sell them.
Here are some threads