I've run this same setup in 2 gen 2 LS Camaros, zero drone while cruising and actually pretty quiet until you get on it.
Jegs 2.5" kit, I make my own H pipe and I use Jones flow through mufflers.
Use good isolators to get the exhaust isolated from the frame/body. Both have tailpipes dumping...
No noteworthy updates, been racking up miles and smiles.
Borgeson box and rag joint made a big difference and the new wheels took away the vibration I had. The throttle position sensor craped the bed, simple fix but I noticed the Fitech TPS was significantly lower quality than the AC Delco...
An older guy at the time bought one of those at our local little dealer. He put a lot of miles on that bike before he couldn't ride anymore. Pretty cool machines
The two boneheads here shred all soft toys, we have several decapitated animals.
One of the shepherds we had growing up had a solid steel ball that was rubber coated, I think they use them to flush out pipes. About the only thing he couldn't destroy. He use to shred empty 5 gallon metal paint...
I've used Fitech twice, I like it and really have no issues. They get a bad review but must issues are operator error. Holley makes a good controller as well.
What I like about this option is I control the tune, I can make edits and get it set the way I want it without the cost of multiple...
Assume you're using a GM ecm?
A buddy of mine used Komet in St Charles IL for his 2012 Camaro that's pushing around 600 to the wheels.
https://g.co/kgs/smmdVB
On my first build I used the Holley mounts, worked with no issue other than the price. On my current Camaro, I used the dingo plates, worked as well as the Holley mounts.
Both builds I repurposed the stock trans mount. Good trans angles no vibrations etc.
The mounts won't move your center line...