I have a 2019 SR 2.7. Crew cab 2wd. I think you find these are very dependable trucks. The 2.7 is regarded as bullet proof.
Seems you’re getting pretty good mpg now.
I also did three mods to increase MPG
1. Increase air pressure in tires to 42 psi
2. Lowered the truck
3. Built a 40% tonneau cover ( I know you didn’t want hear it.)
I lowered it with this kit-
https://sosperformance.com/products/...ts-2016-tacoma
The kit is very well made and engineered. Customer service is top notch.
After I received the kit, I decided I wanted it even lower. So I contacted Tom at SOS and he sent me a different spring perch for the front. I also put a half inch block on the rear. As a result I have 2.5 front, 4 inch rear drop.
Lowering had a positive effect on MPG, but not enough to ever offset the over 600 price tag. You will have to have the front end aligned as the lowering is going to put it way out.
I also built the 40% tonneau cover. It leaves the front part of the bed open. I made it myself for under 60 bucks. It mounts on the bed rail for the cargo tie downs. It's worth about .75 mpg.
I don't see much weight savings removing the TSS and lane departure. these components only weight 2 or 3 pounds. I do see a liability if you ever sell the truck and those saftey features are disabled.
I wanted correct you on the LCE header and defend them a little. I have researched, experimented with and have published articles on exhaust headers. You could say I’m a bit of an expert. Longer primary tubes produce a torque peak at a lower RPM. Shorter tube headers produce peak torque at a higher RPM. Short tube headers are mostly seen on full race engines, because past the torque peak, the long primaries become a restriction and hurt peak HP. On engines that are rarely ran below their torque peak, open primaries are used, such as a top fuel dragster.
On a street driven truck you want longer primaries. I have also looked at the LCE headers. Looks to be a great product and the primary lengths are good for a street driven truck. I would like to see the primaries even longer, around 28-30 inches. But it would be hard to package.