2015+ STI Build: The Ultimate Stage 3+ Conversion

Follow me in this video as I transform this near-stock VA chassis WRX STI into a FULL COBB STAGE 3+ beast! This includes the addition of injectors, fuel pump, catted downpipe, intercooler, AOS, and more!
Grimmspeed
IAG
AEM
Injector Dynamics
Hope you enjoy!
01:00 - Parts Overview
03:15 - Intercooler Removal
04:45 - Downpipe Removal
06:58 - Downpipe Install
09:12 - Fuel Pump removal
12:59 - Injector Install
17:35 - Guage Install
18:50 - Intercooler Install
20:55 - Startup

[@tylercolvin8737]

How did you install the downpipe without getting a P0420 CEL? I've been wanting a downpipe for my 2021 STI

[@boxerbaddies]

This one is catted so technically it shouldn’t throw a code since the cat is before the downstream. A catless downpipe WILL always throw the code because of Cobb’s green speed update. On occasion though, even with a catted pipe, I’ve noticed it still doesn’t recognize the cat. But it’s a little more rare.

[@lucian7182]

Just get a good downpipe, they all throw a code some do it in 60 miles some throw it in hundreds to thousands of miles it’s not a big deal. If I reset my ecu learning I can put 3-400 miles on it without a code, or if I’m doing a lot of rev match downshifting I can trigger the code in 40-80 miles.

[@oler777]

How to destroy your Subaru motor part one

[@boxerbaddies]

Hahaha! Not if you do it right 🤣