If you've driven a turbo then you'll probably be dissapointed, but a
performance camshaft can add quite a bit, though any cam is a
compromise. If you're in the US where 940s all have slushboxes then
there's not much point though, you need a manual gearbox to really take
advantage of the increased high end power of the VX or K cam. There's a
disadvantage too in that it kills low end torque somewhat.