I've fitted a UUC quickshift to my car so the B&M one I bought last year is surplus to requirements. It reduces the gear stick throw by 30% but like all short shift kits (even the BMW OEM one) it causes a small increase in resistance when changing gear.
I had to remove a small amount of material to allow it to clear the larger m3 prop on my vehicle but this doesn't affect the quickshift in any way. The box is included but it requires to small spacers which are pennies from BMW.
I'm asking for £80 posted