a chop saw works really well too.

 

I considered cutting my exhaust down as well but I ended up buying a pre-cut exhaust from www.haibikeshop.com for about $430, which is pretty much the same price that you will find it anywhere else in the stock length in carbon fiber, but this way you don't have to worry about cutting it yourself. I love the sound of mine, and I had a Two Brothers Carbon C-5 on my F4i also, so I know theysound really good on those bikes too.They offer them in 15" and 10", cut down from the stock 20" length. Here is the page from HAI for the Two Brothers M2 http://www.haibikeshop.com/store/ind...roducts_id=450