u/SilentNeighborhood95

I have a 2015 mustang ecoboost with a cold air intake, borla cat back. That’s all aftermarket I’m looking to throw more aftermarket parts on the car not for performance but for reliability. Anything you guys recommend? Also. This is my first mustang and first eco. What are some things I should be changing at 120k miles ?

How easy and expensive to fix this ?

Basically title, has 118k miles. The car fax are crazy on this car 42 service records and two owners. Car was maintained like a mf. Took it to ford to do a leak down test and a balance test everything came back good. Have a slight boost leak that I’m getting fixed asap. What else can I do/add to make the car last?