When i installed my LT headers i got a slight tic sound, my sound is from the thin header tubes letting the valve train noise come thru, also i have had bad luck in the past with shitty aftermarket exhaust gaskets, make sure you always use the gm stock gaskets they seem to work best for me.

 

Awesome thanks for the help guys.

 

I never had the ticking noise/valvetrain noise when i had shorty headers (had JBAs). With LT though i have considerable ticking and valvetrain noise.