Put a pair of washers under each plate of my cut-outs, so I'm putting about half the exhaust through the turbo mufflers and the other half through a pair of 2.5" straight pipes. When the secondaries kick in, it sounds like the end of the world. I guess it's the grown-up equivalent of putting baseball cards in the spokes. . . sure gets the ricer chumps' attention, though. Starting it up, I set off someone's alarm last night.