Dang I really should have! Spent about 3,000 on the gt last month. Still waiting on my mechanic to get done with the install so I'll probably put videos up tmw.
I purchased my stainless power headers and stainless works x-pipe from terry beef cake racing....he gave me a awesome deal and the install went perfect..I haven't had any issues with rubbing,rattling or clearance issues at all..I would recommend these headers and x-pipe combo too anybody..
in all honest, headers in general won't have a huge difference in sound as compared to cat backs, they will all accentuate what you have from the midpipe back,