My 2013 A5 Quattro 6MT has a slipping clutch, which is not horrible right now, but is definitely going. The car is APR stage 2, so the extra torque is definitely putting a strain on the clutch and flywheel. Took it to a local euro car shop and they are asking 3600USD to replace clutch and flywheel. This seems an extreme price, specially considering they would basically just get the same clutch and flywheel, instead of a stronger one that would be better suited for the modifications in this car. My question is: is this price they are asking reasonable? Could I get away with installing another OEM equivalent clutch + flywheel, or will it fail quickly due to stage 2? What should I do?