heres a great site that may be of use to u guys especially if u want to adapt something to your car, the guys that work there are really helpful on the phone as well and will clarify any questions that can be asked.
the site is
http://www.rocketindustries.com.au/and there phone number is (02) 8825 1900
they are located in blacktown west of sydney but can deliver anywhere
hope this helps you guys in ur quest for more speed
cya!