Put my vote in the "S/C Good" - no, make that "S/C worth it", column. Junk is right -you can certainly do without one, but IMHO there are a lot of times when it just takes mucho mas horsepower to get all that weight moving, mileage be damned. I do want to work up a 7th injector setup sometime, but the TRD kit has worked flawlessly for me for about 12K miles in 6 months. Finally, whatever CDAN has must be waaaay good. BigMac