Originally Posted by JustKDX Tech Tips

Some tips on choosing the right pipe for you riding conditions -

If you are riding in tight trees, mountainous areas or in high load conditions such as sand or mud and find you spend much of your time in forth gear or lower then I would suggest the torque pipe. The strong bottom end pull offered by the torque pipe is to your advantage and you may find the more abrupt mid range hit of the rev pipe requires more clutch work in the tight trees and the rear wheel is more likely to break loose and spin in slick/rocky areas where the bike is searching for traction.

A rev pipe is a good choice for those who spend more of their time in third to sixth gear and ride in fast open areas and are looking for a strong mid range hit and better top end power.

When selecting a pipe it is important to remember where you would like the most power focused. A torque pipe will steal a little top end power in trade for improved bottom end performance. The reverse is true for a rev pipe. A torque pipe will allow the KDX to pull hard off the bottom with a less abrupt mid range hit than the rev pipe. The rev pipe gives up some bottom end power and has a more abrupt, authoritative midrange hit and more top end power. Either pipe will make more power everywhere when compared to the stock pipe.

Its important to note that because of differences in port timing the KDX200 and 220 don't react the same to each pipe. Both the FMF pipes and the Pro Circuit pipe were originally designed to be used on the KDX200. Installing a Torque pipe on a KDX200 will improve performance over the stock pipe from idle to wide open throttle. However installing a torque pipe on a KDX220 will improve performance from idle to about 7500 rpm then fall flat just like the stock pipe with no meaningful increase in over rev or higher rpm performance. If you're looking to improve your 220's power delivery from the bottom to top end then a rev pipe is a must. You'll often see the FMF KG-30 advertised as a rev pipe for the 200 and as a torque pipe for the 220 for this very reason. The torque pipe is still a viable choice for 220 owners who focus the majority of their riding in tight technical conditions or for those who want to maximize bottom to mid performance and are willing to give up some upper mid to top end performance in trade.