Hi

I have a Cooper with the following mods:

-K&N Typhoon kit
-JCW exhaust
-MTH header
-MTH remap
-Suspension upgrade

Now I want to add a throttle body V.2. My questions:

1: Is it worth the money?
2: Whats the performance increase?
3: I dont want to add a cam. Is it still a good choice to add a throttle body V.2?
4: How difficult is it to fit?
5: Do I have to renew my remap for this?
6: Are there other performance things I can add to get more out of my Cooper (no cilinder head and cams) like plugs and wires?
7: What will the plugs do? What are the pro and cons of plugs and wires?
8: Whats the best plugs and wires for the Cooper?

Thanks