1. The PCIII is way more important than any choice of exhaust. Get the Powercommander first if you have to make a decision.
2. Give me another week once I get back from the MotoGP round at Laguna & I will get all the GSXR links posted up.
3. I have not had any of the Yoshi systems for the K5/K6 on the dyno yet, but I did install a slip-on for a guy a couple weeks ago. The Suzuki squids go all goo-goo over the Yoshi stuff, but it is really just not that great of a product. I would rate it as average at best in terms of both build quality & performance.
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