After burner noise?

[sdc05gmc2500hd]

Ok so after I've installed my ecm with efi live and edge cst touch screen. And a s&b cold air intake, afe turbo boot, mbrp down pipe 3"down, and 4"cool dual mbrp Exhaust. Now that everything is on after i start it like 1 or 2 sec it make a sound like an after burner from a jet. I dont know if this is normal or what. Does it have something to do with the edge screen turning on. Any ideas?

 

[bluecollar]

That sound is normal its how ur tuning is set-up controling ur turbo vanes

 

[TeaBagger2006]

That's just the vanes cycling. No worris

 

[whitetrash21]

X2. If u dont like it, an efi tune can get rid of it. Stock muffler hides the sound, aftermerket exhausts make it more audible, especially if straight piped.

 

[sdc05gmc2500hd]

It is straight pipe i like the sound i just wasnt sure if it was supposed to sound that way