Headers, Reprogram computer, Volant Cool-air, Catback, LESS POWER?

[Denny Crane]

I ran into these same issues prior to supercharging ours as well. There is a lull fall on it's face dead spot between 1500 - 2000 RPM.

The bottomline is you need programming custom tuned to your performance accessories. The dealer can't and doesn't have the program to do it. The problem is with the ECM and Tranny program and how GM manages Tq. Management which protects the vehicle albeit way to far on the safe side especially once you add more power.

The latest programming GM sent out reduced the effect of Tq. Mgmt but didn't take it all the way out like custom prgrm. can do. And the GM programming can't learn you want more and dis able it itself.

I hope this helps.

Denny
03 Lux Adv.
Kenne Bell Supercharged
XtemeFlow Exh. & Intake
JBA Ceramic Headers
ProStreet Wires
Custom ECM Programming