So you've got a supercharged 2.2 then?
I do believe your garage is talking
with regards to not fitting them. Many members on here have the supercharger fitted, and it has no impact on the chain running the timing. The oil filter breaking down is a common fault, when they aren't replaced frequently enough, due to lack of maintenance and regular oil changed.
2nd hand kits probably go straight in the bin, as they are replaced because the older ones fail, tensioners fail, guide rails break,
Wait for
@evocarlos to wake up, and I'm sure he'll reply with some input, and probably
@corsaZ22se who has supercharged the transplanted 2.2 into his Corsa C.