Nothing wrong with shorties on these platforms. They do offer gains over the stock tri-y headers and will shift your powerband higher. Couple those with an O/R X-pipe and you have a combo that is damn close to LT's in peak power for much less money.
I ran BBK shorties on my 2011. They do change the sound of the car. Not the same as LT's but more of an exotic European sound. Coupled with the Magnaflow 15591 cat-back, one of the best sounding exhausts I have heard on these cars.
A few pics:
Video of the car at the track with said exhaust mods:
Also, if you are going to go with a LT setup, pay careful attention to the primary tube placement where they merge at the collectors. Pypes has the correct firing order and both sets I have installed fit perfectly.
Will aftermarket offroad pipes (lethal performance) bolt up or did you have to by BBK h/x pipes?
H-pipe/X-pipe
Threaded Mode