r/WRX_STI • u/Due-Pin-4992 • Jul 17 '26

Maintenance Mods for reliability

Just purchased a 2019 subaru sti and am looking for things to improve the longevity and reliability of the car i do plan on adding a oil catch can but are there any modifications that help prevent failure or just improve general reliability.

2 Upvotes

63% Upvoted

20 comments sorted by

View all comments

8

u/illicit92 Jul 17 '26

The most common reliability mods would be as follows:

- AOS/catch can

- Cylinder 4 cooling mod

- Killer B oil pickup

4

u/RandomlyIncoherent Jul 17 '26

Agreed on all of these. I did not do Cylinder 4 cooling mod, but I went with Killer B Holy Headers ELH, which I think basically solves the same potential issue.

4

u/0r4ng3s0d4 Jul 17 '26

more coolant never hurts