It gives a nice kick at high rpm if it is working correctly + a change in engine note.
only with an induction kit remember
you will no its working if your car is powering to the red line. the modular manifold went wrong on my stilo and were it was suppose to keep pulling after 5000rpm, i got the same acceleration as i did at say 3k, no extra power at all, and it felt strangled. very annoying, like something was holding it back.
if i knew then what i know now, id have unplugged it and got all my 200 horses back again instead of the 145 i got, grrrrrr
2yrs, me and undless garages spent trying to find the problem, and never got to the bottom of it.
but yeah if its not working, you car will feel strangled and be very reluctant to rev past 5k, it will but not with the vigour it should.
i could tell if was not working if i drove, it, best thing is to find another 2.0 and test drive it, and see if its the same, or a friend with another 2.0TS.