De 3.0 V6 engine got a dual mass flywheel. So fit a 2.5 V6 of 3.2 V6 flywheel, they´re singe mass. Buy a used one, they´re cheap. And fit a new GTA clutch. You will save 5-6 kgs.
And fit GTA intake cams and do chiptuning. It makes the engine much more powerfull after 5500 RPM. No fall back in power until you hit the revlimiter at 7200 RPM
The basic mods for a 3.0 V6 engine.