1. it is personal preference regarding the positioning of the airfilter some like it parallel with the top rail some like it parallel with the TB`s I fall into the latter camp. Just keep the front edge as low as possible.
2. Run to your oil catch tank
3. Have to get backto you on this my notes are not with me , however you need three wires , one switched live and two ignition drivers from the ECU.
4. the tapped hole into the oil filter housing is 12mm X 1.5mm pitch.
Cheerio
Rob