Hi Jacco, thanks for your email. with my GS430 = Air intake, ignition amp, exhaust, headers, modified chip, and head gaskets. Since it's a brand new car, only 3 weeks old, we don't want to mess around more than simple bolt ons !! ya know !! :) Anyways, later on....planning to have a supercharge kit. Let me know....good luck.. JAY from Ab-flug.co.jp