[ToxicPerformance]

What're the performance differences between getting front/rear strut bars and front/rear sway bars? Are there any differences between if they are in the front or rear?
What would you suggest me getting? Is there anything bad if I get all of them(front/rear strut bar and front/rear sway bars)?

Also, if I get an ecu upgrade, would that change the MPG of the car?

Thanks for your time.