Originally Posted by ejschultz
IRO uses their own springs with all their lifts and has RC Hydro 8000 shocks as the standard shocks with some of their lifts. The lifts can be upgraded to RC Nitro 9000 shocks, DT 8000s, or Blisteins. The long arm kits come with DT 8000s because they're one of the longest shocks you can mount in the stock locations. They also used to offer RC kits, IIRC. They had the 4" lift from them. I'd imagine that lift came with a RC warranty, not the IRO warranty.
Not to get off topic or out of forum...
A friend of mine just lifted his XJ with IROs 4" long arm kit. The lift for the rear was originally an add a leaf, but they offered a 3.5" RC leaf spring assembly as an upgrade to add a leaf.
I personally thought that was odd, but it does sit pretty on 33"s!