Teknikscian -- they are the Michelin Power race tires -- totally kick ass (DOT legal race tires) -- most people are too cheap to run them (no offense to anyone), or maybe ride in the rain occasionally -- you DO NOT want to ride in the rain with these tires.
GSXR7RDR -- I love the arrow pipe! It's a tad long, but I was being cheap on the exhaust and just got the slip-on... now I'm eye-balling the Arrow Ti full system, or maybe Racefit? There's always yosh -- they're coming out with some cool shit these days. Anyhow, the Arrow slip-on is like $550 for the can, and another $120 for the mid-pipe -- not the least expensive pipe in town, but they make really good products. I'll be selling my pipe eventually, when I decide on a full system. In fact, I'll probably take it off soon so it doesn't get much more use. Cheers!