20 lbs compared to stock or the lightest other aftermarket system?
Dollar cost per lb of weight saved on the bottom of the car is pretty darn high, many other areas the money would do more good.
BUT, I get it, just so cool to claim to have a titanium exhaust
And the sound, some are great, some not so. I had a high grade SS exhaust with a lot of titanium in it, the best long tube headers with proper collectors and great xpipe, 06 Vette, best sounding LS I have ever heard, one of the few I even liked and I loved it, many compliments though it was not bought for that.
A titanium system might sound great on this car but it might not sound great, too loud, etc...I have heard very expensive systems that sounded horrible.