CaPPY
Bob,
I have the 3" crossflow and I think the duals are quieter, 'cause each pipe has a muffler. The cops stopped me for loudness. I put another muffler in front of the axle (Borla Sportsman 3"). Even with an extra muffler it still drones around two grand. Once you get out of that RPM range it gets quite.
After all that crap, I still think it's a great sounding system and would do it again. The 3" pipes look badas$
Just a tip, when I put mine on, I attached the muffler and pipes in the rear first...after everything was hung I tightened it down. I have no hitting or banging on the floor. It might be because I have new rear springs???