That is the coolist Buick on the planet.
As for the Thrush mufflers:
http://www.jegs.com/webapp/wcs/stores/se...ategoryId=70980
Are they any good?
http://www.nsxprime.com/FAQ/Miscella...austtheory.htm
Do Mufflers "Make" Horsepower?
The answer, simply, is no. The most efficient mufflers can only employ the same scavenging effect as a header, to help slightly overcome the loss of efficiency introduced into the system as back pressure. But I have yet to see an engine that made more power with a muffler than an open header exhaust. "So," you ask, "what the hell is the best flowing muffler I can buy?"
According to the flowbench, two of the best flowing units you can buy are the Walker Dyno Max and the Cyclone Sonic. They even slightly out flow the straight through designs from HKS and GReddy BL series. Amongst the worst, are the Thrush Turbo and Flow Master mufflers. We'll flow some of the newer mufflers as they become available at our local Chief auto.
Read the whole thing for educational purposes.

Sorry about getting off topic. Did I mention that this is the coolist Buick on the planet?