One thing to keep in mind about intake and exhaust mods is not to focus solely on top end horsepower figures. Most 4-stroke engines respond very well to these mods for the improvement of throttle response, low end torque, and overall driveability enjoyment. A handful of small but important mods might indeed only add a couple of horsepower, but where, when, and how that power is distributed in the powerband is what can make a given bike much more pleasurable and useful depending on how you ride. The other two comparable category bikes like the WRR and KLX have proven the benefit of such mods. I have two friends who have the WRR, and they installed a new lower restriction muffler, an airbox mod, and a programmer. Wow!...I was both impressed and jealous. I have a KLX250S with a KLX300 cylinder. I have a full Muzzy exhaust, all airbox mods, and just installed a Mikuni TM36 pumper carb. I also say "Wow!" to how the bike runs and performs now. The TM36 carb costs no more than a programmer, and the jetting knowledge for installing one on a KLX is well known and basically makes the installation a plug-and-play issue. The main point is that not everyone will use their bike in the same way, and not everyone will want all or some of the mods that are available. Nothing wrong with that. But to argue that many or all of these mods don't bring substantive performance and enjoyment returns is a bit of an argument against logic. The Honda is probably going to respond in similar if not exact manner to the type of intake and exhaust mods that many apply to the WRR and KLX. There's no requirement for owners of these bikes to apply any of these mods, but don't poo-poo them based on a personal bias.