I agree @jacknifetoaswan . I used cerakote trim coat sometime in the late summer on all of the rough exterior plastics of the car. They still look great (car parked outside during workday and inside all other times). I recommend this product.
I know you said you have the solo mach exhaust. The Mach thunder exhaust has a resonator/muffler, as does the Mach xv. I’m pretty sure that the Mach xv is quieter than the thunder. Which do you have? If it helps, take a look here...
Regarding the device, you want the hp tuners rtd+. You will note that is the only one they sell at this time. And you want the e85 tune. The e85 tune will come with a 91 and a flex fuel tune.
The light is no inconvenience. It doesn’t glare. It doesn’t intimidate. It doesn’t harass. It just sits there, tiny and barely illumined, as if to say, “Just enjoy your v8-equipped car and stop worrying about the little things.”
There is no such thing. Read through the noise of the vocal minority, especially when they are random people on a forum, people with axes to grind, or people with financial skin in the game. The product offered by Lund is good, as is that offered by the other major tuners.
No one should be...
There are thousands upon thousands of tune-only s550 mustangs running around with no problems. Don’t listen to these hand-wringers. Enjoy modding your car. Tune it. I am sad to admit, however, that the 93 tune is no where near as significant a change for a basic bolt-on NA car as the e85 tune...
You will find a discussion of various seat deletes and their weights here: https://www.mustang6g.com/forums/threads/rear-seat-delete-holy-high-priced-mat-batman.181755/page-4