If you guys go to that site, look at the pics of the exhaust... Is it me, or are those tail pipes just for looks???? The mufflers have a dumps on them! WTF?
It is what Saleen is calling "Dual on demand exhaust pipes"
For day to day driving the engine flows through the two main pipes in the rear center, but when you jump on the gas a valve opens allowing the exhaust to exit thru two additional pipes that are tucked up and under, the ones coming off the mufflers.
Due to D.O.T. “pass by” testing requirements Saleen had to turn the secondary pipes downward at the tips so the sound was bounced off the pavement rather than flowing straight out the rear.
Thus is the problem of being a "Manufacturer" vs a "Tuner".