Re: Austin area cars with PSE or aftermarket exhaust
Check the Hill Country Region for monthly get togethers, you'll likely find a couple of 981s with PSE or aftermarket exhausts. If you're still looking in March, there is a PCA club race and DE event at COTA - should be a good selection of 981s there to listen too.
Finally, if you want to drive COTA, Austin Schnell Fest is scheduled for May, three days of instructed driving on an incredible track. I did the last one in November and will be back in May - the track is world class.
2013 Boxster S
2018 Q3, 2010 XC70, 2001 Wrangler
2014 Moto Guzzi Stelvio