Hfs-3 996TT

[Slvr-GTstreet]

Hi guys!
I'm about to purchase the HfS-3 from Howerton E this weekend for my 996tt. What size nozzles and what location is best for them to maximizing octane. I will start off 75/25 then 100% meth. How hard is it to program the unit. My tuner is ready to re-tune it when finished. I've seen some installs but they have all been 50/50 mixes on Porsches. Oh and my buddy is installing it not me.

Thanks,
Jason