Hello Tood
I can see your exhaust looks very proff. but you have a lot of weight out the back? i have made this for my 911 ls1. it just makes the "right" kind of noise, it is not critic just another way to make it

I dont know if you use a thermostat in your cooling system but i have ysed one from an old BMW 2002 because it is a loose unit u can mount in the hose so you can control the flow better. Have a nice day