Rennlist - Porsche Discussion Forums - 970.2 PTT Exhaust Cutouts / Tune

Hey guys, I decided against the full blown muffler delete and am thinking of doing some aftermarket exhaust cutouts on my 970.2 PTT, mostly for sound

Does anyone have a recommended brand/supplier that will run off the vacuum line and be generally adjustable and reliable

is 3" the right size for the PTT factory exhaust?

Car has an FVD tune, so while mostly for sound, thoughts on cutouts upstream of the cats and updating the tune for a cat delete? (can't actually delete cats, New York car)

or upstream of resonator or exhaust if not.