This is definitely worth getting, installed on my 2012 Ninja 250r and wow! No more hesitation, great throttle response and more power in the low to mid rpm's.
Intended for motorcycles with a stock or mildly tuned engine using a well designed aftermarket pipe with a modified airbox and a stock replacement air filter. Stage 2 kits are designed for applications where individual filters cannot be installed and for applications where airbox modification improves the engine's performance. In most cases power increases of approximately 8% can be achieved.