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[QUOTE=ps_lane01;3436650]I wouldnt get into the hpop unless your having problems with it. My nylon screen was destroyed when I did the egr delete at 140k, at 160k the ipr screen was pushed in and had quite a bit of nylon covering it... So far no problems with the hpop (knock on wood). So dont be surprised if you have a problem with the ipr down the road.
Okay....I don't like having probalems down the road. I like 'peace of mind' and a job half way done bothers me. I've taken the splurge and have ordered a new HPOP with the updated STC installed, along with a new IPR. Ouch, there's another $800. (But think what it would cost to have the dealer do this!) On the plus side, I have to pull the HPOP cover anyway. I have a very minor leak that seems like it might be coming from the back side of that cover. Everything else has been eliminated, except for the rear main seal.
Research on the forums tends to make me think the HPOP's usually go before 200,000 miles.....I'm at 172,000 miles....I believe the level of maintenance severely impacts this.....but to consider the vehicle reliable enough to go 100 miles into the woods, I should change it while I'm in here.