[Lukesportsman]

This is just one data point for you. Mine is a fairly light 72. It will in the end depend on how serious your track intentions are and how much you'll put up with or give up on the street.

I really liked my 21/26 TB's for street. It truely felt like a performance OEM install (of course this was OEM in a heavier 930). I think it is the optimum for street use. I have since gone up to 22/28 hollow and though it certainly is flatter, it is noticeable on broken pavement. Those lucky enough to be in Cali might error stiffer, but eval your own road conditions in Thailand.

Most will certainly recommend stiffer Bilstiens. After these changes, I would look at swaybars to tune it to your liking. Carrera bars are an OEM upgrade but you loose through body install. You will seem to find the most varied opinions here. Some run just front, some near equal and I've seen hardcore guys running larger rear to help turn in. That can bite you in adverse conditions on the street.

Any aero changes? Tires? Ride height? Alignment?