New crank pulley. I did this for two reasons: firstly, the old pulley was slightly damaged when removing as I hadn't spent out on the proper tools for removal/refitting at that point, and it also contains a rubber damper which I was pretty sure had worn/gone hard at this point. I plan on eventually fitting the larger supercharger pulley for this but given the tools I've had to purchase just to complete this job (and fit the pulley back on) it makes sense to use a new pulley.