Listen to these guys man SCT with custom tunes is the only way to go with the 6.0L. I run and have since there was 10000KM on my truck now 150 and no troubles and thats running the looney tune day in and day out. I only take it out to tow. if you want some info on where you can get GOOD custom tunes send me a PM and I will gladly help you out.
2006 PSD CC FX4 Sport SRW S/B
SCT with custom tunes by Quick tricks, Grand Rock turbo back dual 6" Miter cut stacks,
Xenon Fender flares,Tinted factory tails, Recon white lightning L.E.D. light bar, Glasstite topper