Car: 2006 Chrysler SRT8
Join Date: Apr 2007
Thanked 2,239 Times in 2,032 Posts
You don't have to get a tuner but it will help manage codes from missing rear O2 sensors.
I prefer the Diablosport programmers and custom tunes by HemiFever.
Also, it will help with managing air/fuel ratio as well to keep you from going too lean at WOT. Other nice features are setting WOT shift points, managing fan on temperature settings, removing the rev limiter and speed limiter, etc...
Good luck with the build.