2.5 Liter/Litre Factory Motor | IW STi Forum

GR-Exhausts

GD-Exhausts

Discuss anything related to the exhaust system, like muffler, catback, and turboback exhaust systems.

Sticky Compression-Leakdown basic information

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47K

Sticky The Official STi engine Venting, A/O Separators, and Catch Cans Thread!!

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750K

by killerbmotorsport

Sticky Your answer to "I want 400whp" (or more?!)

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Sticky AVCS Gear Cleaning Guide! (Read this if you spun a bearing!)

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by Undyjr

Sticky Read this before you create a new thread about BOVs (Blow-off valves)

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Sticky Motor Oil - All Chapters, Inclusive -Hat Tip to Ferrarichat.com

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Sticky Everything you need to know about E85

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Sticky Extremely good info for first time turbo owners (Determining Turbo Serviceability)

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Sticky Comprehensive Subaru CEL Code List (XLS File Attached)

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by 2.5 turbo hyped

Sticky UPDATED 03/03/10: Planning a turbo build? This is roughly what it will cost you.

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91K

(05 STi) MAJOR ISSUES...CAR NOT STARTING/IDLING (P0301, P0302, P0303, P0304)

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Metallic Engine Knock after Secondary Air Pump Removal (2013 STI) (Video Included)

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by JohnSub2013sti

Do I need a tune to run a Tomei catback with Tomei ELH?

DKG
10 d ago

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461

Quality vacuum lines/fittings

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by Bowah vacuum

AFRs unstable during WOT

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428

Thoughts on the Bloush 2.5XT-R

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604

Running rich when car starts to boost...HELP! :)

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by GrayMetallic12

Metal (aluminum, and maybe others) filings in the radiator hose

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by GrayMetallic12

2010 auto sti sedan rattles in reverse SOMETIMES

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by Karlot

Cold start stumble after 20 seconds

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13K

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by magnetite2020sti

P0021 need help!!!

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805

Cylinder #4 Cooling Mod - Getting ready to install

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by Scargo

2020 STI loud tapping (thinking rod knock) (video included)

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Engine running loud

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932

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Can someone name this sensor please

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by Jedi03

Please please need some help!!

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792

Chasing engine operating issue (knock at light loads) and came up with a question what is the MAF ignition ON but engine OFF value supposed to be?

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by TheOtherDave

Best Way to Replace Oil Dipstick Tube O-Rings

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by Scargo

Can someone help me identify these con. rods?

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by Scargo

Is this too much oil, I drove with it like this for 10-15 miles:(

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by Buma

Will i have to tune for headers?

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48K

Knock even after 5w-40 oil change

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723

Oil leak on back of oil pan?

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391

How does my data log look ? New stock turbo.

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483

Supporting Mods ?

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by prophet7.kemoy

Squealing on turbo spool

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535

What are normal knock values?

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670

Block journal number 5 crack.

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538

How to tell difference from jdm and usdm motor?

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by a5m

2013 STI Died while driving

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by 12GA

Very High AF Learning 1 Idle

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3K

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2010 STI Ecu Plug identification

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