For those of you who have the Greddy catback... has anyone had probems with fitting the B-pipe back on with the o2 sensor in? (which btw was a b!tch to get off the stock pipe) At the angle that they drilled the hole, there is about 0 clearance between the wires and the heat shield above the cat. When I fit the pipe on and screwed everything in, I was just about crushing the wires against it. I had to punch part of it in just to get about half a millimeter of clearance, and when I'm at low rpm or making sharp turns I can hear it rattling underneath.

Otherwise, everything else lines up fine. That sub-2.5k lag from the intake is now gone, and my idle is still silky smooth. Flooring it sounds diesel - a little on the loud side in the low end (probly from y-pipe), but only until ~2.5k.