Flapper was the first 'mod' I did. Don't really know if I could tell much though. Sounded slightly different but that was it for me.
De-baffling was a great cheap upgrade, the stockers are waaay too quiet for me
"A motorcycle is not just a two-wheeled car; the difference between driving a car and climbing onto a motorcycle is the difference between watching TV and actually living your life."
-2005 CBR 600 F4i
-2001 RC51 ** SOLD
-2002 VFR 800**SOLD
-2002 919 **SOLD
-2006 599 ** WRECKED