I came across this page this morning while searching the net for upgrades on the A604. This site seems to have a lot of upgrades, though I am not sure, maybe someone can verify these uprgrades for future insight for us A/T guys.http://www.transmissionspecialty.com/parts/HTM-Part-Pages/Chrysler.htm*rebuild in process*GST Mufflerinjen short ram intakemagnecore 8.5mm wiresEGR removal/blockofffront/rear strut tower barsGSX dual piston calipers