"hay i was just wondering if u could tell me a lil more about these i am totally new to these"
Not a worry happy to help
"do i need a tune at all"
A tune with this in conjunction with this memcal or a tune in general?
The memcal (re calibrated) is basically a "tune" in the modern sense as it controls things like fuel ignition timing etc. Which is turn can provide you with more power and better fuel economy depending on how it's been calibrated.
"and how hard are these to install my self"
They are easy to install and the installation procedure is very similar to that shown in the link below
http://forums.justcommodores.com.au...ur-new-memcal-your-vn-vs-commodore-v6-v8.html
If you have any more questions please don't hesitate to ask.
Kindest Regards,
Steve