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Anybody make or sell larger than stock injector lines for 03-04.5 Cumminsthat run from the rail to the delivery tubes? I've checked all the main websites (alligator, XDP, Scheid, etc.) and can't find any.

Buddy of mine told me with my setup that I should look into UCD and that I would benefit from it. Said it's the closest thing to EFI Live that I can get with an 03CR? What do you guys think about the UDC tuning? Worth the time and money? Could I learn to do it myself or just take it somewhere...