Hello,
You will need to purchase a tuner here
http://www.jreperformanceparts.com/g...-flash-gm.html
The first custom tune is included for CAI and Any cat back systems.
Then select the header tune option of 110.00 total is 509.00 plus shipping to your destination.
This buys you in to our buy parts from me get tunes for free program, so any future part purchases from JRE included FREE tune updates for those parts.
We offer the finest tuning available anywhere.
Thank you for your business and your service to our country.
Ted.