1st I am NOT a HP JUNKIE.My (1) foremost concern is longevity and Durability,I have been running 26/28K on My 03 form 2004 to current, the 1st 5.9 pump was 80% formerly know as the wild Pump it went 128K and was R/R out and Now lives in a pulling truck in WI,this engine still has its factory Sprayers only remove to install 90s for 1 month, this truck pulls 20/30k in stop and go traffic Daily (Shammrock will verify the scale Tickets), this Motor has tore up 1 build trans 104K,1 diff 118K, 2 Drive axles rear ,12 front U-Joints,it will be 10 years old 10-22-12,this engine would love to live the life of competition,It runs (Idle) on the job site daily 2/4hrs lifting My electronic lifts,I have owned or operated 100s of different trucks in My fleet (Construction company) dealt with 10s of thousand truck owners over 34 years of experience,I have work under contract for Cat,Cummins,others,I have access to mosts of the TQ labs available Here in the Metro.
Nothing wrong with being a HP junkie, (If thats what you enjoy) I talk to 800/1000hp owners everyday.
We sponsor 1 2006 5.9 that makes 900/1000Hp Duals. My enjoyment is making My truck make some $ and hauling *** while doing it, that stays to together for years and cost pennies on the dollar to operate.
If You want HP NO problem ,its much easier then putting one together that last for years under DD conditions.In most cases YOU can't have both (600+Hp), the HP truck will eventually suck up your wallet if you plan on having it Last or operate pennies on the dollar.
TWR keeps close records on Every Vehicle the company owns.On paper that 2003 has made the company over $100.000.00s ..I like. I also know of 3 local owners with 400K+ on CRs (many others) still going strong and making $$$$ at 450+hp.
On edit; The last time I dyno the 03 502hp 1003TQ , Max HP with the 90s 603HP it been running the Banks T-Dog stacked for 5 years and the Banks form 2004. I had Joe ***** build My own OP system back 2005.