I didn't have the stock before, I had Yoshi TriOval titanium bolt ons, the ems remapped, air box small mod and Bmc air filter.
Now the bike gains RPM quicker than before you can feel the weight is lighter but the problem is that the new pipe is too loud.
I bought YOSHIMURA JAPANESE EXAHUST not the american,
is a bit expensive but gives you more HP, the only problem is
the noise emission.
All I need now is a couple of wings.