H P Tuners
 

There are many tunes for H3's offering fixed upgrades for 3 to 4 hundred $. Most folks are satisfied. If your not your kind of stuck with it...
This High Performance Tune looks interesting since it gives options to plug and play your own H3 system controls.
High Performance Tuners has the product that allows users to make thier own tune using the HPT interface and software. Thru your own laptop you can tweak control parameters for enhanced performance.

Searching back the only H3 member here was Chevy High Performance and he liked the HP Tune.

Anyone else have feedback with this on the I 5 engine?