Titanium is more durable, and stronger than aluminum. However, as a more exotic material, it is more expensive.
Most systems mount in the stock location using stock hardware.
If special hardware or mounting material is needed, Erion Racing can provide it. No, a bolt-on advance rotor advances timing through the complete RPM range, which can cause a decrease in power at some RPM levels. Erion Racing uses the stock Honda air filters because they produce the most consistent horsepower of all filters we have tested.