Looks like he has 235/40/18 on the front, probably 265/35/18 rears. They look like OZ Alleggerita. Same setup I'm looking to get on my 4S for the winter.

 

I also noticed that you got your winters on already. The temp is surely dropping fast. I think I'll put my winter on this weekend as well.
Have you join the PCA DE at PIR before? I'm sure you will enjoy your cars even more if you give it a try. Cheers!

 

This is an old thread and the pics were taken last winter. I swap my winter tire/wheel set up in the first week of October as the temps drop to the low 40's at night. I bought the entire set of tires/wheels from Tirerack for $2845. It includes the 235/40R-18 and 265/40R-18 Michelin PA 2's along w/ 18x8.5 and 18x10 OZ Alleggerita HLT MGS. The cost includes shipping.

BTW, I decided to stay with the stock exhaust, no steering wheel change for the time being. 991 not very appealing to me as the interior is too much like my Cayenne and the rear overhang just does'nt seem right atleast on the pictures. No plans for a Carrera 4GTS either ;-)

Driven 1.8K miles in the last three months with not a drop of oil added. I did spend handsomely on a ticket for not renewing the license tabs. It's frustrating for me as I hand wash that license plate every week and I looked at those close up shots of the rear so many times prior to posting them last year.

 

Check out Dallas Custom Steering wheel. Had a wheel padded and wrapped in Alcantara. Best mod I made on the car and was really cheap.
Before you go for the exhaust, it is really easy to install a different intake. Not so sure how these are on the .2s, but on the .1s, it made a great growl above 5k RPM that solved my need for a little more growl when I got on the throttle.