Floating front bush to fit primary gears with 1.75" bore. Fits with no modification or honing required. Fits 1275/1300 primary gears with 1.75" diameter, but will not work in 1.78" bore original Mini Cooper S primary gears, or later A+. Note: check the inner bush area is not machined on an angle by the oil hole as this will damage the new floating bush. This is how most A+ gears are machined.