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  1. 2015+ STI Discussion
    SI drive flashing S, traction control, cruise control flashing. Installed ** Cobb- flex fuel sensor/ fuel pressure/ sf ram intake Turbo smart- FPR AEM- x-series UEGO gauge p/n 30-0300 Tomei- equal length header/up pipe TB6010-SB02B Grimmspeed- catted down pipe/ Ebcs Crawford - AOS v3 Injector...
  2. General Subaru Discussion
    A month ago I purchased a new to me 2011 Subaru STI with only 40K miles! It was pretty rough but after some TLC I'm pretty happy with it. The car had a check engine light for Secondary Air Valve when I purchased the car. I installed Ktech blocking plates and plan to have those engine codes...
  3. FAQ/Newbie Forum
    Hey everyone, I am planning on buying a 2021 STI, never owned a subie before, know people who have many years ago but no one with anything newer than a Hawkeye. A lot of people I know always saythe EJ isn’t reliable. I know they had issues with the block before and overheating cylinders but are...
  4. FAQ/Newbie Forum
    I just picked up an 05 STi and it was running fine. I went to install an accessport and now the vehicle has a hard time accelerating but will build boost. It almost feel as if i were hitting the rev limiter. Could i be that the vehicle has a grimm speed boost control and the tune it is currently...
  5. FAQ/Newbie Forum
    Hey guys, I'm new to this forum and sorta new to Subarus, especially an STI. Soon, I'll have my 2008 STI hatch on the road after a full engine rebuild. All stock, with the exception of a catted Invidia down pipe. I know the basics of Subaru and their common issues, however I'd like to get more...
  6. General Subaru Discussion
    So I was looking under the dash on the drivers side of my 2016 sti and noticed this box with what looks like a dial and max and min values on it its spliced in to a few wires off the ecu its also has at least 2 thicker gauge orange wires not sure where they are connected to any help would be...
  7. GD-General
    okay so I literally just bought a 2004 wrx sti and the guy before me did not tighten down the lug nuts and they came off on the front left of the car and proceeded to rip the bottom half of my fender off and after this I lost power to all the window and to the cluster on the dash but I didn't...
  8. GD-General
    Hello, To start off I have a 07 STI Limited, Parts on car: IAG stage 2 Tuff block IAG AOS Tomei UEL Headers, Up pipe, Downpipe and Cat back IAG Oil Feed Line Act Clutch Kartboy short throw Accessport Pro Tune The rest of the car engine wise is stock. So when I replaced the Oil feed...
  9. 2015+ STI Discussion
    I'm not sure where to post this but I am out of ideas and stumped. I'm experiencing some sputtering and running rich while WOT passing 5-6k rpms. The problem slowly began as a slight power loss. Tuner detects slight misfires on cylinder 1 and 4 (already swapped coilpacks) motor was rebuilt 10k...
  10. FAQ/Newbie Forum
    I’ve had this car for about 6 months now and recently noticed a slight oil leak. I don’t even know what the part is called. Haven’t had any issues with the car. Was hoping one of you subi wizards can help me out. Whatever that blue plug is connected to that’s where it’s coming from.
  11. Detailing & Car Care
    I think my waterbottle leaked, and my passenger seat was pretty wet / possibly soaked. I'm in a 2016 sti with Alcantara heated seats. Is there anything I need to do to ensure this doesn't get ruined?? I've got the heater on HI, and I warmed up a towel in my dryer and set it on the seat, as...
  12. General Subaru Discussion
    So I just bought a 2011 wrx sti the person before done stuff to it which makes the car stutter if you punch it and in high rpm and 3rd gear has no power. Does the car need a new tune ? Would you think the tune on it now is causing that issue. Other than that the car runs normal
  13. 2015+ STI Discussion
    I know I've seen this info around here but I honestly can't find it. I know the transmission uses a 75w90 GL-5 rated gear oil (I'm going with Motul 300 for this) What I can't find, is what to use in the front/rear differentials. Are they clutch based diffs, or gear based? From my understanding...
  14. General Subaru Discussion
    I finally built my baby. I have an 07 STi that I built (head gaskets blew and consumed a quart of oil every 300 mi) and after a very bumpy road of dealing with "knock" during engine break in and troubleshooting, I finally tuned perfectly on 93 octane. I put one tank of E85 and it felt amazing...
  15. FAQ/Newbie Forum
    Hey there. Been scouring the internet with minor results and my lack of knowledge. I have a 2015 sti and the low beam internal led burnt out. Took it to a shop and sadly that was the result. I'm assuming these are the limited headlights and I was trying to find aftermarket ones but all of them...
  16. GD-General
    So really I'm just looking for some opinions from experienced owners of the car, I'm planning on buying the car as fun project/me time car. I have a daily driver for work and everything else. The car has a NEW ej257 2.5 L motor, forged internals, new turbo, new piping, fuel system, injectors...
  17. Built Motor Discussion
    Have an 06 STI with a freshly built motor, tgv/top feed conversion deletes, Cobb e85, Speed density tune, fuelab external pump (500+lph), fuelab regulator, Grams 1000cc injectors -8 feed/-6 return Rotated pte 5858 I’m having a problem with my first start up. I have fuel to the cylinders, have...
  18. GD-General
    Seen this car for sale and it peeked my interest. Seems to go to be true but any advice, opinions, and or knowledge would be greatly appreciated ! The car Its a 2000 wrx sti jdm
  19. GD-General
    Hello all. I really need some help here. I have an 05 STI that I have fully rebuild and power comes on good feels reliable and delivers as advertised. Unless I make a left hand turn at like an intersection at about 20 mph. The problem is the car seems to drop to idle and no matter how hard i...
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