Recommendations for H2 supercharger

[lesteryeong]

I am contemplating on the Vortech setup right now with the Jet Chips Transmission Power Shift chip and module.

http://www.vortechsuperchargers.com/product.php?p=116

Anybody knows the differences between the V-3 SCi-Trim and V-2 SQ Si-Trim?

Here's the Power Shift:

http://www.car-stuff.com/carparts/hu...702416576.html

Is it really necessary?

Finally, the stick H2 has a speed limitation of 160km/hr. Will the supercharger kit overcome this problem?

Appreciate the help.

Thank you.