Tbh, with my present setup, the turbo is already rather vocal and free. The noise/pitch is no different and with regards to throttle response, I've just changed my plugs for some Pulstar plugs, which are know to give a good response, and there is slight improvement in the way it pulls. Very slight difference, but nothing to write home about.
Of course, it's down to individual's perception and as a free mod, no harm can be done. Let us know how you get mate.
where did you buy your number plate lights from? Would you rate them?
James.