If you can spare your Nitro for a few days, please contact Reina at K&N Filters, they are looking for 2-3 more 4.0L Nitro's in the SoCal Area for R&D and Testing.
You will have to contact them for the exact time they need your vehicle, and compensation.
K&N Engineering, Inc.
1455 Citrus St.
Riverside, California 92507
Is the address you would want to be nearby to, contact information can be found on K&N's website(knfilters.com).
You will be given a rental car, Chevy Malibu or equivalent.
You "should" be receiving a complimentary version of their full CAI once released.
The faster we can get some 4.0L's the faster we will have a sub-$400 source for 8-13HP!(dyno chart coming mid-July)