They're a solid CNC machined aluminium bush to replace the stock rubber ones on
the gear shift linkages.
42 Draft Designs Shift Bushings
They go here (looking down from the right-hand side of the engine bay, under the
Fitting is a doddle. Flick the holding clip with a fingernail, pull back the
springy bit and the end pops off.
Then punch out the plastic corners holding in the rubber bush, and slot in the
Will update after some driving :)