I am going to order a chip from stillen.com and a intake k&n.....someone please tell me where the computer is with some pics...i have to take it out and send back to stillen...is this upgrade worthwhile...

Hi there sdteb. You may want to post your message on the US forums as the GS400 was not available in the UK and the ECU upgrades are for US models only so not many people would be able to help.

http://us.lexusownersclub.com/forums/