I'd go with the Corsa. I've got the intake, cat-back set up with the Double H pipe, and with active valves.
Cold starts are nasty :)
No drone while cruising
An absolute monster during WOT
Not to mention everyone always asks, "what do you got in that thing"
https://www.autogeek.net/src-finishing-polish-32.html
Here's an option. I love this stuff. Easy to work with, no dusting, smells great, and works amazingly.
I agree with sms2022. If that doesn't help it could be a selanoid. I have that same transmission in my 2014 F150. There was an issue with the molded lead frame. Basically the metal particulate would cause that very same issue you're having. So Ford was supposed to put 2 magnets in every pan to...
I 100% agree with vacuuming, first. As far as the rest of the hard surface interior, if it is bad as you say, I'd recommend a gentle cleaning solution, and areate the hell out of the solution. You want a decent foam that you wipe on and in all of the cracks/crevices with a plush wash mit. Then...
I'm running 25mm on the front and 20mm on the back. All 4 of the tires tread sits inside the wheel wells and I don't get road grime slung onto the car. No rubbing either.
Wheel Accessories Parts Set of 2... https://www.amazon.com/dp/B07TP2SJQV?ref=ppx_pop_mob_ap_share