Congratulations on your first mod, CobraKai! It really sounds great when using TracKey. When I got my car I couldn't wait to take the restrictors out. When I took the side pipes down, the previous owner had already removed them! I've since added Corsa Exteme axle backs and finally the sound is perfect to my aged ears. We'll be here every step of the way to cheer you on as you start down that slippery mod slope, so grab that credit card and go to town. By the way, I love the front end shot of your LS. I can imagine what people think when they see you coming up fast in their rear view mirror !
The track key was tuned with the plates out and with a K&N drop in filter in the stock airbox. This is the set up that I run in my car and have trapped over 118 several times on my 20 inch rims.