hmm not that i wish to sound like im putting anyone down but my car at abbey, gain an extra 17hp making 294 at the fly (estimated by abbey) and 264bhp at the wheels, it doesnt feel any faster if im honest but,
you can feel the engine revs more freely and if i just slam my foot on the accelerator there is no hesitation that i had before it would take 2-3 seconds before the revs started building now its instant,
the biggest difference from my point of view is drifting might have only been i think a 25lbft increase but its enough at Norfolk and pod that clutch kicks arnt needed anymore
from my experience on a 120k 2003 import does it make the car faster no not at all does it make it respond better yes it did is that worth £400+ to someone who just uses there car for daily roaming and sitting in car parks down the local Crooze probably not.