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I've got the same on my Gen 2 though mine are stainless, and mine are not loud at all. (No baffles).
They used to have a little bit of a pop when changing gears or on the over-run, but I stopped that this week by inserting a bearing / marble into the PAIR valve hose...(refer marble mod).
When I checked the Yoshi web site, I was surprised to find that they state that with the Yoshi's, my bike would make 2-3 hp less, but I figured the look and sound was worth it, along with the weight saving, plus being able to hear it, made it feel quicker......lol.
You will get improvements from flashing the ECU, (don't bother with a PC), but not much if any of the improvement will be down to the slip-ons as the rest of the exhaust is where the restriction is.
If you're happy with the way it goes, leave it alone and enjoy......
ps: get yourself some earplugs and let the bird sing......
Click here for PAIR mod.
http://www.australian-hayabusa-club.com/...?tid=22899
They used to have a little bit of a pop when changing gears or on the over-run, but I stopped that this week by inserting a bearing / marble into the PAIR valve hose...(refer marble mod).
When I checked the Yoshi web site, I was surprised to find that they state that with the Yoshi's, my bike would make 2-3 hp less, but I figured the look and sound was worth it, along with the weight saving, plus being able to hear it, made it feel quicker......lol.
You will get improvements from flashing the ECU, (don't bother with a PC), but not much if any of the improvement will be down to the slip-ons as the rest of the exhaust is where the restriction is.
If you're happy with the way it goes, leave it alone and enjoy......
ps: get yourself some earplugs and let the bird sing......
Click here for PAIR mod.
http://www.australian-hayabusa-club.com/...?tid=22899