Hi Simon,amazingly well with standard suspension.After driving Kevins GTV6 you realise there is miles of scope to improve the handling to take even more advantage of the 3.6 motor.
As for the standard brakes they wilt in no time on a track day just because your approach speeds are that much higher.

Also I would like the added safety of having an uprated braking system as it just inspires so much more confidence in the car.It's lousy doing a track day and braking earlier than you otherwise would, just to try and get the car to scrub off some speed appropriate for the next corner.
Take the one I did earlier this year at Kyalamy.Coming down the Mineshaft it's a downhill straight into a roughly 45 degree left hand bend leading into a very tight right hander.With the 3.6 I was pulling just over 6000rpms in fourth gear through the left hander then accelerating for a little extra after the apex but then having to stand on the brakes with everything to scrub off enough speed to take a corner that's sharper than 90 degrees.

I managed about 6 laps and my brakes were finished with smoke pouring off the front and rear discs.
I also have no intention of ever selling my GTV6,so it's a life long hobby for me to try and improve it and one day let my nephew inherit it from me.