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Old 09-07-2021, 09:34 AM   #2
Scooby Newbie
Member#: 510765
Join Date: Jan 2020
2020 WRX STI


I'm going through this process right now. Honestly, it's not cheap, but the simpler you keep the parts list, the cheaper and more sense it makes. In my opinion from the research I've done and my experiences so far:

- Cobb complete flex fuel package (~$2500)
- Downpipe (price varies if you choose catted or not)
- Cobb Accessport ($600)
- 3 port EBCS (~$100)
- Custom flex fuel tune (varies)

Simple, no nonsense parts list that gets you in the ~335 hp/365 tq range on E85. Everything else is diminishing returns, and return per dollar isn't really there in my opinion. This setup will land somewhere between 4 and 5k all in and is plenty of fun for a car like this.

The rest (intake, exhaust, etc.) is nice and fun, but it's fluff. The only reason I changed exhausts at all is because I couldn't tolerate the stock exhaust drone, so I had one fabricated that fixed it. And I'm sticking with stock intake because I'm not really into the noisemakers anymore, at least on turbocharged engines. But I understand the appeal, so it's really limited to your budget and how far you want to take it. Personally, I prefer the least amount of parts replaced as possible.
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