There are several small air filters that can be adapted to your engine. Check through the numerous parts suppliers. The key word is, "adapted". To answer your basic question: Yes, an open intake and exhaust will, USUALLY, improve performance. You engine is a pump. it pumps air into a cylinder, mixes in fuel to make it combustible, then adds a spark to ignite it. The more air and fuel you can get in, the more performance you get out. WITH LIMITATIONS. In a perfect world, if you have an otherrwise stock engine and add on better air intake and better exhaust, you get better power. That said, by adding the open air cleaner, you have increased the amount of air in the combustion chamber, but, did nothing regarding fuel. In other words, you have leaned out the mixture. Or, another way, provided less power making fuel. The exhaust, on the other hand, really doesn't matter. As long as it is not too short or too restrictive, on your stock engine, a free flowing exhaust is, if anything, just an aid in clearing the chamber. Look at it this way. Again, in a perfect world, if the open intake and exhaust gave you a net of 10% increase in power, (that would be an amazing amount for those mods), you would then have 3.3 horsepower. You aren't going to feel it, but, you'll probably enjoy the look and ride.