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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45K

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

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741K

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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89K

2017 sti oil pressure issue

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3K

by dansal

Wideband AFR stuck at 8.50 ?

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157

Old Shortblock worth anything?

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170

by Jedi03

Uppipe Heatshield

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321

by a5m

Oil filter too close to the header

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474

IAG Injector sleeve stuck in old TGV?

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257

by kopele

Why is only AF Learning 1B high?

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168

257 ra short block w stock header?

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383

by JakobySmith91

Cooling/reliability upgrades

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735

by killerbmotorsport

What would you do on a 250k mile motor while it's out of the car?

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22

909

High silver and copper count after oil analysis

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508

by nissanfanatic

Rough Idle on Cold Start

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13K

2015+ STI camshaft position sensor location? P0341

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16K

Oil Spray around turbo

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by killerbmotorsport

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378

Blitz KKK Turbos?

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532

2004 WRX STI Low compression on all 4 cyl

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327

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163

by Bdroie

Oil pooling on top of Engine below the intake manifold.

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422

by killerbmotorsport

Swapping a Timing Belt to a Chain

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18K

by tylerbaldwin45

Cyclinder 4 Misfire on 18 STi stock block

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732

2005 WRX STI With Low Compression across all cylinders

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2K

by Ethan.Rotten

Can someone help?

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375

2018 sti 9 psi WOT mostly stock

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898

Question about getting oil pressure

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359

by killerbmotorsport

The engine knocking or slapping sound when turning off.

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326

Spec C intercooler spray install

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89K

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47

3K

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285

P0021 need help!!!

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415

Blown, stock 2021 STI motor

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799

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614

Super-G Oil Pan in action

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495

by killerbmotorsport

RA piston metallurgical/hardness analysis results

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2K

Coolant Expansion Tank = Relocating 2 hoses

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969