I've put out a few posts about strange noises coming from the drivetrain. After a couple weeks of driving and careful listening, I'm pretty sure it's the continental tires. Around town they sound more like off road tires. Does anyone else notice this? I'm getting ready to change to PS2's and was wondering if anyone else who changed tires experienced less tire noise. I'm also considering some Renntech mods. Has anyone done just the pulley and ecu? Notice a big difference? Any other mods make more sense? I would rather not mess around with headers.