Search is your friend. Simple upgrade is JBD box which increases fuel pressure. Some other products out there, after that you are looking at ECU modifications before you start getting more involved mechanically (which goes against minor, IMHO
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For suspension if you have a non Sport setup it is softer: lots of threads on the general suspension forum (its not D specific in that regards if you are going aftermarket: the stock Sport setup may have slightly different rates to account for weight bias but that should also be searchable to find out)
While tempted to slap in a JBD, I am still under warranty and honestly the sucker moves as it is and I am not that tempted to get more given no locking rear diff
- b