Sorry complete noob question here.

I've been looking around for modifying my xt660z Tenere '08.

Bike is completely stock as is, and the only mods I want to do are:

- Kev fuel mod
- o2 controller from Kev
and eventually:
- Single can exhaust

No filter mods.

I read a lot about the surging stopping when installing the O2 mod, but my bike doesn't surge at all, at least not that I notice.

As for the Kev fuel mod, the instructions say that with a Stage 1 filter the position should be set to 2 to 3 O'clock, this is already barely activated let alone when the stock filter is installed.

Now my question is: what benefits will I get from the O2 and Kev fuel mod with stock air filters and stock exhaust, and eventually with single can exhaust?