Performance or freer flowing aftermarket air filters do have their own set of benefits. These are generally more expensive than stock, agreed. But then, these also last a whole lot longer. Add to it the performance benefit one gets because the engine has to work less to suck in more air. And more air means, more fuel being injected. And therefore, you get better throttle response, more usable torque, and in most cases, a nicer intake note.
Motowings Performance - the same guys who make the Trident exhaust for the Interceptor which we absolutely love - have a performance air filter for the motorcycle as well. Called the Hyper Flow Air Filter, it costs Rs 3,500. And one can buy it online from a number of sites. Just google it, and you will find it. Now, you have other options in the market as well, but we are not comparing one against the other in this review. This is more about the Motowings claims, and if we could feel the difference on the road.