For the moment, each respective section more or less contains pertinent performance upgrades. The reference section is most of the how-to's and repair stuff. The Swaps/Turbo/Buildup section is prettymuch the M42 performance section. Other sections have a lot of upgrade info as well.
Now, should the need arise to separate performance from repair stuff, it will definitely be done. For now though, things are not big enough to need a division. Thanks for the suggestion though, it may come in handy in the future.