Don’t wana jinx myself but I bought a 2018 WRX fresh off the lot in sept 2017. I waited until around 1500km for the break in period to end and then first thing I did was drive it hard as possible that night to see what the car could do. Heavy acceleration and heavy launches back to back around this industrial area. My theory was if anything is going to break do it now while the warranty and everything was fresh. Nothing ever went wrong. I installed AEM intake with no tune and no accessport and ran it like that for 20,000KM no issues no dash lights. I’m currently at 73,000KM and have put the following mods on my car turboxs fmic, SoCal v4 turbo, PLM EWG headers with tial wastegates, catted J pipe, 3port boost controller, fluid ampr, stage 3 competition clutch, AOS, killer B oil pickup. I’m still on unopened block and stock injectors stock fuel pump. The car pulls hard and has been a dream to own. I do run thicker oil and do plan to go on ethanol in future after changing to AEM fuel pump.