just got my 2000 ecu today for 50 bucks, i ordered my knock sensor too. It arrives on thursday, i paid 150 for the sensor... so 200 for one of the best mods i can possibly get for my 2002 gts. i should have it on in time for the next track day which is the 12th at irwindale, i'll see how much it helps. my best is a 9.6 with a 2.2 60'. but i'll be there this thursday(5th) if it doesnt rain, trying for a 9.5.