Question: how to remove hpop on 6.0?
Answer:  Remove turbo drain tube.
 Disconnect IPR electrical connector and remove IPR.
 Remove EGR Cooler clamp.
 Remove HPOP cover bolts, the 3 on the passenger side will un-thread but not come out.
 Pry open HPOP cover with handle end of screwdriver and remove carefully not to drop the 3 bolts on the passenger side.