Yep that is the MAF, the sliver thingy
With the 10% and 15% it leans the fuel mixture by the amount chosen, so theres less fuel being put in with the same amount of air.(The LS1's run around 11 A/F and should be around 14. it's all in the name of safety for Holden) And on some LS1's the 15% MAF can make the engine detonate as maybe it is not running so rich in the first place and leans it out too much. So the 10% would be best.
Well 17 grand is just a complete rip off. Here they are around $4500 for the M48 top shelf model. But it depends on your exchange rate.
It might be quite a while until someone on your side gets the EDIT program, but is good to look around.Your better off getting the stock computer redone, it will be cheaper and will probably squeeze more power with less problems. As i said before you can get someone to do it for you or if you are know your stuff you can get one for your car.
CAPA sell supercharger kits that bring power upto 380kW and a computer program is supplied. Problem is that you have to give them your computer to put it in. But apperently the service is very poor and there can be problems as the supercharger is known to be very ancient in design. This is just from what i have heard from 2 people who have these kits their LS1 cars. One makes 305rwKw with the stock engine and auto
Also if you want a nice kick in the arse go for the 3.46 gears or 3.7's(but can really hurt fuel) if you have an auto and 3.91 if you have a manual
