I saw a muffler today that was incredible! My friend just brought home a new 2008 Corvette with the option exhaust. There are two mufflers sitting side by side with four stainless tips (two on each muffler). I would love to use just one of these mufflers on my Crossfire. Under normal driving exhaust comes from one tip but when the vacuum drops a butterfly inside the other tip open for a straight through exhaust with a roar. Has anyone seen this type of muffler available in the aftermarket?