this set up isnt straight pipes though. It still uses the factory gutted mufflers.I have heard the X-pipe and I don't like it at all. Do a youtube search for "quattroporte straight pipe" and listen to the silver car at the top. That's with a X-pipe and muffler delete. Sure, it's loud but it lost the Italian note these cars are known for.
Additionally, I love the stock tips. These were popular with the Ferraris of this era and were used on the Enzo due to the sporty yet understated styling.