I have one set of each length completed. The 3" set will work with stock hoses, however it should be considered only for testing and you should plan on replacing hoses or getting extenders for them.
The 4" set requires longer brake & clutch hoses. If you have a back problem or the numb right hand syndrome, or just want to sit upright this may be a solution. These are adjustable in height around the stock axis in 6 degree increments.
$355 shipped.