C6 Z06 Corvette has stock exhaust, no headers but with a custom 3 inch X-pipe

Sound level in Dba went down from 94 to 85 Dba at idle with X-pipe installed. Good exhaust pulses can now be heard

As we have seen in other Corvettes ( review other Xpipe test results in other threads) gains with a proper size and placement see about 50 HP and Tq

Review test results below

Exhaust tone with muffler damper open/closed with X-pipe installed can be heard in this video